查找与排序编程题
- 单词查找（查找——基本题）
- 排座位（简）a
单词查找（查找——基本题）
【问题描述】
从标准输入中读入一个英文单词及查找方式，在一个给定的英文常用单词字典文件dictionary3000.txt中查找该单词，返回查找结果（查找到返回1，否则返回0）和查找过程中单词的比较次数。查找前，先将所有字典中单词读入至一个单词表（数组）中，然后按要求进行查找。字典中单词总数不超过3500，单词中的字符都是英文小写字母，并已按字典序排好序（可从课件下载区下载该字典文件）。字典中的单词和待查找单词的字符个数不超过20。
注意：读取文件中的单词时，若要判断行末的换行符，换行符可能是’\n’，也可能是两个字符：‘\r’和’\n’。
查找方式说明：查找方式以1~4数字表示，每个数字含义如下：
1：在单词表中以顺序查找方式查找，因为单词表已排好序，遇到相同的或第一个比待查找的单词大的单词，就要终止查找；
2：在单词表中以折半查找方式查找（折半查找的实现方式要参考上课PPT中的实现方式）；
3：在单词表中通过索引表来获取单词查找范围，并在该查找范围中以折半方式查找。索引表构建方式为：以26个英文字母为头字母的单词在字典中的起始位置和单词个数来构建索引表，如：
该索引表表明以字母a开头的单词在单词表中的开始下标位置为0，单词个数为248。
4：按下面给定的hash函数为字典中单词构造一个hash表，hash冲突时按字典序依次存放单词。hash查找遇到冲突时，采用链地址法处理，在冲突链表中找到或未找到(遇到第一个比待查找的单词大的单词或链表结束)便结束查找。
/* compute hash value for string */
#define NHASH 3001
#define MULT 37
unsigned int hash(char *str)
{
unsigned int h=0; char *p; for(p=str; *p!='\0'; p++) h = MULT*h + *p; return h % NHASH;}
提示：hash表可以构建成指针数组，hash冲突的单词形成一有序链表。
【输入形式】
单词字典文件dictionary3000.txt存放在当前目录下，待查找单词和查找方式从标准输入读取。待查找单词只包含英文小写字母，与表示查找方式的整数之间以一个空格分隔。
【输出形式】
将查找结果和单词比较次数输出到标准输出上，两整数之间以一个空格分隔。
【样例输入与输出】
单词字典文件dictionary3000.txt与课件下载中提供的相同，下面两列中，左侧为待查找单词与查找方式，右侧为对应的输出结果：
【样例说明】
wins在单词字典中不存在，4种查找方式都输出结果0，顺序查找、折半查找、索引查找和hash查找的单词比较次数分别为：3314、12、7和2次（wins的hash位置与字典中physics和suggest相同）。
yes在单词字典中存在，4种查找方式都输出结果1，顺序查找、折半查找、索引查找和hash查找的单词比较次数分别为：3357、10、4和1。
【评分标准】
该题要求输出查找结果和查找过程中的单词比较次数，提交程序名为find.c。
首先放上dictionary的链接：（有点长大家直接拖到后面）
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modern
mom
moment
monday
money
monitor
month
mood
moon
moral
morally
more
moreover
morning
most
mostly
mother
motion
motor
motorcycle
mount
mountain
mouse
mouth
move
movement
movie
moving
mr
mrs
ms
much
mud
multiply
mum
murder
muscle
museum
music
musical
musician
must
my
myself
mysterious
mystery
nail
naked
name
narrow
nation
national
natural
naturally
nature
navy
near
nearby
nearly
neat
neatly
necessarily
necessary
neck
need
needle
negative
neighbour
neighbourhood
neither
nephew
nerve
nervous
nervously
nest
net
network
never
nevertheless
new
newly
news
newspaper
next
nice
nicely
niece
night
no
nobody
noise
noisily
noisy
non
none
nonsense
nor
normal
normally
north
northern
nose
not
note
nothing
notice
noticeable
novel
november
now
nowhere
nuclear
number
nurse
nut
obey
object
objective
observation
observe
obtain
obvious
obviously
occasion
occasionally
occupied
occupy
occur
ocean
october
odd
oddly
of
off
offence
offend
offensive
offer
office
officer
official
officially
often
oh
oil
ok
old
oldfashioned
on
once
one
onion
only
onto
open
opening
openly
operate
operation
opinion
opponent
opportunity
oppose
opposed
opposing
opposite
opposition
option
or
orange
order
ordinary
organ
organization
organize
organized
origin
original
originally
other
otherwise
ought
our
ours
ourselves
out
outdoor
outdoors
outer
outline
output
outside
outstanding
oven
over
overall
overcome
owe
own
owner
pace
pack
package
packaging
packet
page
pain
painful
paint
painter
painting
pair
palace
pale
pan
panel
pants
paper
parallel
parent
park
parliament
part
particular
particularly
partly
partner
partnership
party
pass
passage
passenger
passing
passport
past
path
patience
patient
pattern
pause
pay
payment
peace
peaceful
peak
pen
pence
pencil
penny
pension
people
pepper
per
perfect
perfectly
perform
performance
performer
perhaps
period
permanent
permanently
permission
permit
person
personal
personality
personally
persuade
pet
petrol
phase
philosophy
phone
photocopy
photograph
photographer
photography
phrase
physical
physically
physics
piano
pick
picture
piece
pig
pile
pill
pilot
pin
pink
pint
pipe
pitch
pity
place
plain
plan
plane
planet
planning
plant
plastic
plate
platform
play
player
pleasant
pleasantly
please
pleased
pleasing
pleasure
plenty
plot
plug
plus
pm
pocket
poem
poetry
point
pointed
poison
poisonous
pole
police
policy
polish
polite
politely
political
politically
politician
politics
pollution
pool
poor
pop
popular
population
port
pose
position
positive
possess
possession
possibility
possible
possibly
post
pot
potato
potential
potentially
pound
pour
powder
power
powerful
practical
practically
practice
practise
praise
prayer
precise
precisely
predict
prefer
preference
pregnant
premises
preparation
prepare
prepared
presence
present
presentation
preserve
president
press
pressure
presumably
pretend
pretty
prevent
previous
previously
price
pride
priest
primarily
primary
prime
prince
princess
principle
print
printer
printing
prior
priority
prison
prisoner
private
privately
prize
probable
probably
problem
procedure
proceed
process
produce
producer
product
production
profession
professional
professor
profit
program
programme
progress
project
promise
promote
promotion
prompt
promptly
pronounce
pronunciation
proof
proper
properly
property
proportion
proposal
propose
prospect
protect
protection
protest
proud
proudly
prove
provide
provided
pt
pub
public
publication
publicity
publicly
publish
publishing
pull
punch
punish
punishment
pupil
purchase
pure
purely
purple
purpose
pursue
push
put
qualification
qualified
qualify
quality
quantity
quarter
queen
question
quick
quickly
quiet
quietly
quit
quite
quote
race
racing
radio
rail
railway
rain
raise
range
rank
rapid
rapidly
rare
rarely
rate
rather
raw
re
reach
react
reaction
read
reader
reading
ready
real
realistic
reality
realize
really
rear
reason
reasonable
reasonably
recall
receipt
receive
recent
recently
reception
reckon
recognition
recognize
recommend
record
recording
recover
red
reduce
reduction
refer
reference
reflect
reform
refrigerator
refusal
refuse
regard
regarding
region
regional
register
regret
regular
regularly
regulation
reject
relate
related
relation
relationship
relative
relatively
relax
relaxed
relaxing
release
relevant
relief
religion
religious
rely
remain
remaining
remains
remark
remarkable
remarkably
remember
remind
remote
removal
remove
rent
rented
repair
repeat
repeated
repeatedly
replace
reply
report
represent
representative
reproduce
reputation
request
require
requirement
rescue
research
reservation
reserve
resident
resist
resistance
resolve
resort
resource
respect
respond
response
responsibility
responsible
rest
restaurant
restore
restrict
restricted
restriction
result
retain
retire
retired
retirement
return
reveal
reverse
review
revise
revision
revolution
reward
rhythm
rice
rich
rid
ride
rider
ridiculous
riding
right
rightly
ring
rise
risk
rival
river
road
rob
rock
role
roll
romantic
roof
room
root
rope
rough
roughly
round
rounded
route
routine
row
royal
rub
rubber
rubbish
rude
rudely
ruin
ruined
rule
ruler
rumour
run
runner
running
rural
rush
sack
sad
sadly
sadness
safe
safely
safety
sail
sailing
sailor
salad
salary
sale
salt
salty
same
sample
sand
satisfaction
satisfied
satisfy
satisfying
saturday
sauce
save
saving
say
scale
scare
scared
scene
schedule
scheme
school
science
scientific
scientist
scissors
score
scratch
scream
screen
screw
sea
seal
search
season
seat
second
secondary
secret
secretary
secretly
section
sector
secure
security
see
seed
seek
seem
select
selection
self
sell
senate
senator
send
senior
sense
sensible
sensitive
sentence
separate
separated
separately
separation
september
series
serious
seriously
servant
serve
service
session
set
settle
several
severe
severely
sew
sewing
sex
sexual
sexually
shade
shadow
shake
shall
shallow
shame
shape
shaped
share
sharp
sharply
shave
she
sheep
sheet
shelf
shell
shelter
shift
shine
shiny
ship
shirt
shock
shocked
shocking
shoe
shoot
shooting
shop
shopping
short
shortly
shot
should
shoulder
shout
show
shower
shut
shy
sick
side
sideways
sight
sign
signal
signature
significant
significantly
silence
silent
silk
silly
silver
similar
similarly
simple
simply
since
sincere
sincerely
sing
singer
singing
single
sink
sir
sister
sit
site
situation
size
skilful
skilfully
skill
skilled
skin
skirt
sky
sleep
sleeve
slice
slide
slight
slightly
slip
slope
slow
slowly
small
smart
smash
smell
smile
smoke
smoking
smooth
smoothly
snake
snow
so
soap
social
socially
society
sock
soft
softly
software
soil
soldier
solid
solution
solve
some
somebody
somehow
something
sometimes
somewhat
somewhere
son
song
soon
sore
sorry
sort
soul
sound
soup
sour
source
south
southern
space
spare
speak
speaker
special
specialist
specially
specific
specifically
speech
speed
spell
spelling
spend
spice
spicy
spider
spin
spirit
spiritual
spite
split
spoil
spoken
spoon
sport
spot
spray
spread
spring
square
squeeze
stable
staff
stage
stair
stamp
stand
standard
star
stare
start
state
statement
station
statue
status
stay
steadily
steady
steal
steam
steel
steep
steeply
steer
step
stick
sticky
stiff
stiffly
still
sting
stir
stock
stomach
stone
stop
store
storm
story
stove
straight
strain
strange
strangely
stranger
strategy
stream
street
strength
stress
stressed
stretch
strict
strictly
strike
striking
string
strip
stripe
striped
stroke
strong
strongly
structure
struggle
student
studio
study
stuff
stupid
style
subject
substance
substantial
substantially
substitute
succeed
success
successful
successfully
such
suck
sudden
suddenly
suffer
suffering
sufficient
sufficiently
sugar
suggest
suggestion
suit
suitable
suitcase
suited
sum
summary
summer
sun
sunday
superior
supermarket
supply
support
supporter
suppose
sure
surely
surface
surname
surprise
surprised
surprising
surprisingly
surround
surrounding
surroundings
survey
survive
suspect
suspicion
suspicious
swallow
swear
swearing
sweat
sweater
sweep
sweet
swell
swelling
swim
swimming
swing
switch
swollen
symbol
sympathetic
sympathy
system
table
tablet
tackle
tail
take
talk
tall
tank
tap
tape
target
task
taste
tax
taxi
tea
teach
teacher
teaching
team
tear
technical
technique
technology
telephone
television
tell
temperature
temporarily
temporary
tend
tendency
tension
tent
term
terrible
terribly
test
text
than
thank
thanks
that
the
theatre
their
theirs
them
theme
themselves
then
theory
there
therefore
they
thick
thickly
thickness
thief
thin
thing
think
thinking
thirsty
this
thorough
thoroughly
though
thought
thread
threat
threaten
threatening
throat
through
throughout
throw
thumb
thursday
thus
ticket
tidy
tie
tight
tightly
till
time
timetable
tin
tiny
tip
tire
tired
tiring
title
to
today
toe
together
toilet
tomato
tomorrow
ton
tone
tongue
tonight
tonne
too
tool
tooth
top
topic
total
totally
touch
tough
tour
tourist
towards
towel
tower
town
toy
trace
track
trade
trading
tradition
traditional
traditionally
traffic
train
training
transfer
transform
translate
translation
transparent
transport
trap
travel
traveller
treat
treatment
tree
trend
trial
triangle
trick
trip
tropical
trouble
trousers
truck
true
truly
trust
truth
try
tube
tuesday
tune
tunnel
turn
tv
twice
twin
twist
twisted
type
typical
typically
tyre
ugly
ultimate
ultimately
umbrella
unable
unacceptable
uncertain
uncle
uncomfortable
unconscious
uncontrolled
under
underground
underneath
understand
understanding
underwater
underwear
undo
unemployed
unemployment
unexpected
unexpectedly
unfair
unfairly
unfortunate
unfortunately
unfriendly
unhappiness
unhappy
uniform
unimportant
union
unique
unit
unite
united
universe
university
unkind
unknown
unless
unlike
unlikely
unload
unlucky
unnecessary
unpleasant
unreasonable
unsteady
unsuccessful
untidy
until
unusual
unusually
unwilling
unwillingly
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upon
upper
upset
upsetting
upside
upstairs
upward
upwards
urban
urge
urgent
us
use
used
useful
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usual
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valid
valley
valuable
value
van
variation
varied
variety
various
vary
vast
vegetable
vehicle
venture
version
vertical
very
via
victim
victory
video
view
village
violence
violent
violently
virtually
virus
visible
vision
visit
visitor
vital
vocabulary
voice
volume
vote
wage
waist
wait
waiter
wake
walk
walking
wall
wallet
wander
want
war
warm
warmth
warn
warning
wash
washing
waste
watch
water
wave
way
we
weak
weakness
wealth
weapon
wear
weather
web
website
wedding
wednesday
week
weekend
weekly
weigh
weight
welcome
well
west
western
wet
what
whatever
wheel
when
whenever
where
whereas
wherever
whether
which
while
whilst
whisper
whistle
white
who
whoever
whole
whom
whose
why
wide
widely
width
wife
wild
wildly
will
willing
willingly
willingness
win
wind
window
wine
wing
winner
winning
winter
wire
wise
wish
with
withdraw
within
without
witness
woman
wonder
wonderful
wood
wooden
wool
word
work
worker
working
world
worried
worry
worrying
worse
worship
worth
would
wound
wounded
wrap
wrapping
wrist
write
writer
writing
written
wrong
wrongly
yard
yawn
yeah
year
yellow
yes
yesterday
yet
you
young
your
yours
yourself
youth
zero
zone
首先，在文件中读取单词 的方法一定要会，尤其是对于结尾换行符的处理，这里用fscanf，不要用fgets，因为fgets会读取到后面的换行符。
int main(){ memset(dictionary,0,sizeof(char)*MAXLEN*MAXNUM); char buff[21]; int i=0; FILE* fp=fopen("dictionary3000.txt","r"); if(fp==NULL) return 0; while((fscanf(fp,"%s",buff))!=EOF) { strcpy(dictionary[i++],buff); memset(buff,0,MAXLEN); } return 0;}完整代码：
#include<stdio.h>#include<string.h>#include<stdlib.h>#include<assert.h>#define MAXNUM 3367#define MAXLEN 21#define NHASH 3001#define MULT 37char dictionary[MAXNUM][MAXLEN];typedef struct node{ int start; char block[1000][21]; int total;}INDEXNODE;typedef struct node1{ char words[21]; struct node1* next;}HASHNODE;unsigned int hash(char *str){ unsigned int h=0; char *p; for(p=str; *p!='\0'; p++) h = MULT*h + *p; return h % NHASH;}void SequentialSearch(char*);void BinSearch(char*);void IndexSearch(char*);void HashSearch(char*);int main(){ //此处为从文件中读取单词并放在数组里 memset(dictionary,0,sizeof(char)*MAXLEN*MAXNUM); char buff[21]; int i=0; FILE* fp=fopen("dictionary3000.txt","r"); if(fp==NULL) return 0; while((fscanf(fp,"%s",buff))!=EOF) { strcpy(dictionary[i++],buff); memset(buff,0,MAXLEN); } // //输入目标单词和查询方式，然后跳转到对应的接口 char target[21]; int N; scanf("%s",target);//注意，这里不能用gets，因为gets要一直读到换行，但是题目要求的输入方式是“单词 方式”，中间有一个空格 scanf("%d",&N); switch (N) { case 1: SequentialSearch(target); break; case 2: BinSearch(target); break; case 3: IndexSearch(target); break; case 4: HashSearch(target); break; default: break; } return 0;}void SequentialSearch(char* s){ int i=0; int num=0; for(;i<MAXNUM;i++) { int cmp=strcmp(s,dictionary[i]); num++; if(cmp==0) { printf("%d %d",1,num); return; } else if(cmp<0) { num++; printf("%d %d",0,num-1); return; } } //这一步用于解决查找完了整个词典，也没有找到目标单词的情况 if(i==MAXNUM) printf("%d %d",0,MAXNUM); }void BinSearch(char* s){ int left=0,right=MAXNUM-1; int num=0; while(left<=right) { int mid=(left+right)/2; int cmp=strcmp(s,dictionary[mid]); num++; if(cmp==0) { printf("%d %d",1,num); break; } else if(cmp>0) left=mid+1; else right=mid-1; } if(left>right) printf("%d %d",0,num);}void IndexSearch(char* s){ INDEXNODE block[26]; int j=0; int num=0; int ch='a'; for(int i=0;i<26;i++) { num=0; block[i].start=ch; for(;j<MAXNUM&&dictionary[j][0]==ch;j++) { strcpy(block[i].block[num++],dictionary[j]); } block[i].total=num; ch++; } int left=0,right=25,mid; while (left<=right) { mid=left+right; if(s[0]==block[mid].start) { if(block[mid].total==0) { printf("%d %d",0,0); return; } else break; } else if(s[0]>block[mid].start) left=mid+1; else right=mid-1; } int low=0,high=block[mid].total-1,middle; num=0; while(low<=high) { middle=(low+high)/2; int cmp=strcmp(s,block[mid].block[middle]); num++; if(cmp==0) { printf("%d %d",1,num); return; } else if(cmp>0) { low=middle+1; } else high=middle-1; } if(low>high) printf("%d %d",0,num);}void HashSearch(char* s){ HASHNODE* table[MAXNUM]; for(int i=0;i<MAXNUM;i++) { table[i]=(HASHNODE*)malloc(sizeof(HASHNODE)); table[i]->words[0]='\0'; table[i]->next=NULL; } for(int i=0;i<MAXNUM;i++) { unsigned int key=hash(dictionary[i]); HASHNODE* new = (HASHNODE*)malloc(sizeof(HASHNODE)); new->next=NULL; strcpy(new->words,dictionary[i]); HASHNODE* cur=table[key]; while(cur->next!=NULL) cur=cur->next; cur->next=new; } unsigned int key=hash(s); int num=0; HASHNODE* cur=table[key]; while(cur->next!=NULL) { int cmp=strcmp(s,cur->next->words); num++; if(cmp==0) { printf("%d %d",1,num); break; } else if(cmp>0) cur=cur->next; else { printf("%d %d",0,num); break; } } if(cur->next==NULL) printf("%d %d",0,num);}排座位（简）a
【问题描述】某班级要进行期末考试，准备考试时打乱座次，现已按照学号顺序人工为学生随机安排了座位号，但其中可能会出现漏排和重复安排座位的情况。编写程序读入人工安排的考试座位安排表T1，对安排情况进行检查，并对漏排和重复安排座位的情况进行修正，修正后，若学生人数为N，则每位学生考试座位安排应在1~N之间，其中没有缺号和重号。假设T1中学号信息不会出现重复，同一座位号最多有两位同学的座位号相同，并且座位号不会连续漏排；初始考试座位安排表存放在当前目录下的in.txt中，其中包括每位学生的学号、姓名和座位号，要求修正后的考试座位安排表输出到当前目录下的out.txt文件中。程序检查座位号的规则如下：
1、首先对考试座位安排表T1按座位号从小到大的顺序排序（原始考试安排可能有座位号相同情况，座位号相同时则按原始学号顺序排序），得到按座位号排序的安排表T2；
2、对表T2从头开始检查漏排座位号情况：假设当前表中安排的最大座位号为M，取M和N的较小值Q；从1号开始检查，若某个小于等于Q的座位序号没有安排学生，则将表T2的最后学生的座位设置为该座位号；若存在多个漏排座位，则从表T2最后依次向前设置；
3、然后再检查表T2中重排座位号情况：假设当前表中安排的最大座位号为m，将座位号重复的、学号较大的学生的座位号依次设置为m+1、m+2、m+3…；
- 将调整好的表T2按学号由小到大序排序后按输出格式要求输出至指定输出文件中。
【输入形式】
从标准输入中读入学生人数（不超过100的正整数）。
初始考试座位安排表存储在当前目录下的in.txt文件中，已按照学号由小到大的顺序分行存储每位学生座位信息，依次为学生学号（不超过8位的正整数）、姓名（由不超过20位的英文字母组成）和座位号（不超过100的正整数），各数据间以一个空格分隔。最后一个学生座位信息后有回车换行。
【输出形式】
按照学号由小到大的顺序将修正后的考试座位安排表输出到当前目录下的out.txt文件中，每行依次为学号、姓名和座位号，各数据之间以一个空格分隔。
【样例输入】
24
假设当前目录下的in.txt文件内容如下：
18373001 sh*tian 7
18373002 WangLi 15
18373003 LiGuoHong 23
18373005 QianSanQiang 26
18373006 ZhangQiang 8
18373007 SunXiXi 2
18373010 LiXing 12
18373011 TangYing 20
18373012 YangYang 4
18373013 ZhaoGang 27
18373014 ZhouLiang 18
18373015 WuShuo 9
18373016 ZhengSiSi 13
18373017 WangGong 27
18373018 TianTian 21
18373020 LeiLei 16
18373021 ZhangLou 10
18373022 WangLei 17
18373025 SunTian 24
18373026 JinXiang 18
18373028 PangHong 11
18373029 GaoLiang 2
18373030 GaoHang 6
18373031 YangYang 22
【样例输出】
当前目录下的out.txt文件内容应为：
18373001 sh*tian 7
18373002 WangLi 15
18373003 LiGuoHong 19
18373005 QianSanQiang 5
18373006 ZhangQiang 8
18373007 SunXiXi 2
18373010 LiXing 12
18373011 TangYing 20
18373012 YangYang 4
18373013 ZhaoGang 3
18373014 ZhouLiang 18
18373015 WuShuo 9
18373016 ZhengSiSi 13
18373017 WangGong 1
18373018 TianTian 21
18373020 LeiLei 16
18373021 ZhangLou 10
18373022 WangLei 17
18373025 SunTian 14
18373026 JinXiang 24
18373028 PangHong 11
18373029 GaoLiang 23
18373030 GaoHang 6
18373031 YangYang 22
【样例说明】
初始考试座位安排表中有24位学生的排位信息，正确情况下这些学生安排的座位号应为1~24。初始人工安排的座位信息有1、3、5、14和19号座位漏排，有2、18和27号座位重复安排学生。先对漏排的座位进行修正：已安排的最大座位号为27，学号为18373017和18373013的学生分别安排了27号座位，按照漏排座位修正规则，先将18373017学生安排在1号座位，再将18373013学生安排在3号座位；同理分别将18373005学生安排在5号座位，将18373025学生安排在14号座位，18373003号学生安排在19号座位。当前安排的最大座位号为22，还有2号和18号座位重复，将2号重复的学号较大的18373029号学生安排在23号座位，将18号重复的学号较大的18373026号学生安排在24号座位。这样修正后按照学号由小到大的顺序输出学生座位信息到out.txt中。
【评分标准】
按照要求修正学生座位信息，提交程序文件名为seat.c。
这个题有一个易错的地方就是：调整规则的第二条。“当前表”应该是每调整一个学生的座位号，表都要更新一次。
#include<stdio.h>#include<stdlib.h>#include<string.h>typedef struct node{ int id; char name[21]; int seat;}STU;int cmp1(const void*p1,const void*p2){ return (*(STU*)p1).seat-(*(STU*)p2).seat;}int cmp2(const void*p1,const void*p2){ return (*(STU*)p1).id-(*(STU*)p2).id;}int N=0;STU* arr;void SeatSort();//这个函数用于规则1中的初步排序void CheckNeg();//这个用于规则2中的检查漏排void CheckSame();//这个用于检查重复的void OutPut();//这个用于最终打印int main(){ FILE* fp=fopen("in.txt","r"); if(fp==NULL) return 0; scanf("%d",&N); arr=(STU*)malloc(sizeof(STU)*N); for(int i=0;i<N;i++) { fscanf(fp,"%d %21s %d",&arr[i].id,arr[i].name,&arr[i].seat); } SeatSort(); CheckNeg(); CheckSame(); OutPut(); fclose(fp); return 0;}void SeatSort(){ qsort(arr,N,sizeof(STU),cmp1); for(int i=0;i<N;i++) { int start=i; int num=1; while(i+1<N&&arr[i].seat==arr[i+1].seat) { num++; i++; } if(num>1) { qsort(arr+start,num,sizeof(STU),cmp2); } } }void CheckNeg(){ int M=arr[N-1].seat; int Q=M>N?N:M; int last=N-1; for(int i=1;i<=Q;i++) { int j=0; for(;j<N;j++) { if(arr[j].seat==i) break; } if(j==N) { arr[last].seat=i; qsort(arr,N,sizeof(STU),cmp1); M=arr[N-1].seat; Q=M>N?N:M; } } for(int i=0;i<N;i++) { int start=i; int num=1; while(i+1<N&&arr[i].seat==arr[i+1].seat) { num++; i++; } if(num>1) { qsort(arr+start,num,sizeof(STU),cmp2); } } }void CheckSame(){ int M=arr[N-1].seat; for(int i=0;i<N;i++) { if(i+1<N&&arr[i].seat==arr[i+1].seat) { arr[i+1].seat=++M; i++; } } qsort(arr,N,sizeof(STU),cmp1); for(int i=0;i<N;i++) { int start=i; int num=1; while(i+1<N&&arr[i].seat==arr[i+1].seat) { num++; i++; } if(num>1) { qsort(arr+start,num,sizeof(STU),cmp2); } } }void OutPut(){ qsort(arr,N,sizeof(STU),cmp2); FILE* new=fopen("out.txt","w"); for(int i=0;i<N;i++) { fprintf(new,"%d %s %d\n",arr[i].id,arr[i].name,arr[i].seat); } fclose(new);}