0 like 0 dislike
7.2k views

A string p is a prefix of a string s if the leading characters of s are identical to p. For example, "abc" is a prefix of "abcde". Develop a function prefix that checks if a C string p is a prefix of another C string s.

p是s的前綴若s開頭的一段字串等於p。例如,"abc"是"abcde"的前綴。寫一個程式 判斷字串p是否字串s的前綴。

Example input 1:

abc
abcde

Example output 1:

abc is a prefix of abcde

 

Example input 2:

bc
abcde

Example output 2:

bc is not a prefix of abcde

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited

edited by | 7.2k views
0 0
12345

27 Answers

0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
* * ** ******* ** ** **** * n[999],str[999];
* * * **** * ** *** * * * * * * n);
* * * ** ** * * ** *** *** ** str);
***** ************ *** * ** *** * * *** *** ** * *** * * * * *** * * ** *
*** * ** * * ** * *** ** * *** * * * * ** ** * ** * * * * * is a prefix of %s",n,str);
* ** ** * ******* **** ** ***** ** * * ** *
** **** ** ** ** * * * * * ***** ** ** *
*** ** * **** * **** **** ** * ** ** * * * *** **** * * * * *** * * * * is not a prefix of %s",n,str);
* * * ** *** ***** * * ** ** * *** **
* * * **** * ** * * * 0;
}
answered by (-249 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
0 0
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
* ***** ** *** ****
** **** * ** *

int main()
{
* * ** * * ***** * i,plen;
** ** * ** * ******** * * **
* ** * ** ** ** * * * * * ** * **
* ** * * ** **** *

** * * ** * * * * ** *** *

** * ** * ** ** * * * **** i++)
* * ****** ***** ** *

* *** ** ** * ***
*
**** * * *** is not a prefix of * * ****
return 0;

 }


if (i==plen-1)
* * * ** is a prefix of * *****

* ***** * * * * * * **


}
answered by (-336 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>

int main() {
** **** * *** * * * p[1000],s[1000];
** ** ** ** * ** *** i=0,re=0,len;

** * ****** * * * * * **** *** * **** p);
*** ** ** ***** * * *** * * s);
* * ******* * ** * *

** * ** *** * ** **** * *** ******** {
** * **** *** * ** ***** * * * * * * ** **** {
* * ** *** * *** *** *** * * ******* * * **** * *** ** ** ** * *** * **
** * * * ******* * *** **** ****** * * * * * * * * * * * * * * ****
**** **** * ** * * * ** * *** * **
** * * ******** * **
** ** *** ** * * *** *** ** {
*** * * * * * ** **** * * ** * ** * **** * * **** is a prefix of %s", p, s);
** * * * * ** ** * * *
* * ** **** * ** *** *** ** if(re==1) {
**** * ** * * * * ** * ******* ** * * * ** * * *** is not a prefix of %s", p, s);
    }
}
answered by (-120 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{

* **** **** ** ** ** a[100],b[100],c[100];
* * ** * * * **** * *** * * ** ***** **
    int l1,l2,i=0;
***** * ** * ***** ***** * ****
* *** * * * * * ** *******
*** **** * **** ** ** *** *
* * ** * ** *** * * *** *** **** * * * **** **** * is not a prefix of %s",a,b);
    }
* * * *** * **** * *** if(l1<=l2){
* ******* ** ** * ** * * ** * ***** * * ** prefix = 1;
* * * ** ** ** * ** * * * * ***** * * ** *** ** ** *
* ** * ** * * ***** ** * ***** * *** * *** * ** * * * ** ** **** * (a[i]!=b[i]){
* ** * * *** * ****** * * * **** ****** * **** * * * * ** * **** ** ** ** * * * *** ** ** is not a prefix of %s",a,b);
*** * ** * * * * ** ** ***** * **** * * * * ** * ****** *** * * *** *** *** *** = 0;
** ** *** * * ***** ** * * *** ** ** * * * *** **** ** * *** * *** * * *
*** ** ***** * * * ** ** *** * *** ** ** ** * * * *** * ** ** * *** ** ** ***
* *** *** *** * ** * **** * * ** * * * * * *
* **** ***** **** ** *** * *** ** * * * * ** == 1){
** ** ** * *** *** ***** * * ** ** * **** **** * * ** * *** is a prefix of %s",a,b);
* * * * *** ***** ** ** * **** * ** *
    }
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:8:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
0 0
prog.c: In function 'main':
prog.c:7:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:7:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include ** * * ** * *
#include **** * * * *
#include * ** ****

int main()
{
** ** ** * *** *** *** **** * prefix[100];
* ** * **** * ** word[100];
* * ** *** **** **** * * * * ** ** %s", prefix, word);
** * ******** ** * ** ** *** i;
* * ******* * * = 0; i< strlen(prefix); ++i)
** * ** * * * * *
** ** **** * * ** * * * ** ***** ** ** ****
** * * *** ***** ****** ** ** * * * ***** ***
** ******* *** * *** * ******* * **** **** * **** * * *** ** ** * * is not a prefix of %s", prefix, word);
** ** ****** * * * **** ***** ** * ** * * ** ** *** * * ** ** ** ** ** 0;
*** * * * ** * * *** ** * *** * *** *** ** * *
* **** ** ** *** *
* * ** ** ** * * *** ** *** is a prefix of %s", prefix, word);
******* ** *** **** * 0;
}
answered
edited by
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include **** *** ** *
#include * * * *****

int main(){
* **** * * * * * ** * ** p[100],s[100];
* * ** ** ** * ***** * ** *** *
** * * * * * ** * * bf=1;
** * *** * * *** * * * ** * **
**** * ** * ***** * ** * **** * * ****** *** * * ** * bf=0;
* **** * * ** ***

* * *** * *** ** **** * * * *** is a prefix of %s",p,s);
** * ** * ** ** ** * * *** is not a prefix of * * * **
* *** * * ** *** ** * * 0;
}
answered by (-116 points)
0 0
prog.c: In function 'main':
prog.c:5:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:6:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cclwPOj6.o: In function `main':
prog.c:(.text+0x26): warning: the `gets' function is dangerous and should not be used.
0 0
prog.c: In function 'main':
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
** ****** ** * ****** ** i,count=0;
* * ** * * *** * * string1[100];
***** ** **** * ***** * *** string2[100];
*** * ** * ****** * ** * *** * *
* ** * ** * * ** * * * ** * *

** *** * * * * ** * * * ***
* ******* **** **
*** ** * * * * * * *** ** * ******* * * * *** **
** * * * * ** ***** *** *** * * ***** * **
** ** * * * **** ** **** *** ***** * *** ** * * * * ** ** ********
* * ** * * * * ** *** * * * * ** *** ** * * *
    }
*** * ** * * * *** ** **
** * * * * **
* **** ** * * * * * * * * ***** *** *** *** * is a prefix of %s",string1,string2);
* * * *** ** ****** **
** ***** ** ** *** *
** ****** ** ** ** ** * ** * *
** ** ** ** * * * * * *** * * * *** * is not a prefix of %s",string1,string2);
** ** * * ** * ** ** **
*** **** *** ** * ** * ** *** 0;
}
answered by (-323 points)
edited by
0 0
prog.c: In function 'main':
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string1);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:10:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string2);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccIBxtbQ.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.71.254.205
©2016-2025

Related questions

0 like 0 dislike
57 answers
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings
ID: 41431 - Available when: Unlimited - Due to: Unlimited
| 10.5k views
0 like 0 dislike
29 answers
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings by thopd (12.1k points)
ID: 41436 - Available when: Unlimited - Due to: Unlimited
| 6.9k views
0 like 0 dislike
53 answers
[Exercise] Coding (C) - asked Jan 4, 2018 in Chapter 13: Strings by semicolon (5.2k points)
ID: 40715 - Available when: 2018-01-04 18:00 - Due to: Unlimited
| 9.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users