1 like 0 dislike
8.3k 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

 

[Exam] asked in Final Exam
ID: 42299 - Available when: 2018-01-17 14:00 - Due to: Unlimited

retagged by | 8.3k views

37 Answers

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


int isprefix(char prefix[], char txt[]){
*** * ***** *** * i,flag=1;
*** *** * ** ** ** * * ** * * * * * ***
** * * * ** ** *** ** *** *** * * ** *** * **** ** ** ***** *
*** ** * * *** * ** ** **

* ** * * * ** **** flag;
}


char prefix[100],txt[100],i;

int main(){
****** * ** **** ** * ** * *
**** * * * * ***** ** * *

**** * * * * ** ****** * * ****** * *** *
***** * * * * *** * * **** *** * **** *** *** * * *** * * * * *
* ** *** * ** *** * ** * * * * * ** ** ** ** is a prefix of ",prefix, txt);
** ** * **** **** * *** * ** ** **** * ** **** ** * * * * * ** ** ** *****
* * ***** ** **** **
**** * * * ** *** *** * {
*** * * * * *** * * * * * * *** * ** * * * * * *** ***** * *** * * * ********** *
*** ** *** * ** * * * * **** *** *** *** ** is not a prefix of ",prefix, txt);
******* ********** * * ******* * **** * * * * ** * ** * * ** ** ** * * *** * **
* * * * * ***** *
*** **** * * * *** *** 0;
}
answered by (-286 points)
0 0
prog.c: In function 'main':
prog.c:24:16: warning: too many arguments for format [-Wformat-extra-args]
         printf(" is a prefix of ",prefix, txt);
                ^~~~~~~~~~~~~~~~~~
prog.c:29:16: warning: too many arguments for format [-Wformat-extra-args]
         printf(" is not a prefix of ",prefix, txt);
                ^~~~~~~~~~~~~~~~~~~~~~
0 like 0 dislike
Hidden content!
* * ** * *
* *** ** *
char prefix(char string1[],char string2[] )
{
**** * ** ** ** * ** **** i,a;
* ** * * * ** * ** * ***
**** * ** **** * * * * ** * ** * * *
** * * **

** * *** ** ** * * * * * * * **** **
  {
* * * ** * * *** * ** *** * ** ** * *** * ***
* **** ** * *** ** **** ** * *** * * ** *
* * ** **
*** * *** *** ** *** *** **
*** * * * ** * ** * * ** * *** is a prefix of %s", string1,string2);}
**** * ** * * ** **** ** ** is not a prefix of %s", string1,string2);}
* *** ***
**** * ***
* * * ******
*** ** ** ** ** * *** * ** * ***** ** * * ** ** * *** ** * * *
* ****** *
***** *** ***** * * * ** ** ** * * * **** * *
* ******** ***** * * * * * * ** *
*** ** ** * *** * *** ***** *** ********* * * * * * **** * ** *
** ** ******* ** * * * *** *
** * ** ***
* ** ** **** *** * ***** * *
* ** *** * * ** ** * *** is a prefix of %s", string2,string1);}
* **** ** * * * *** * *** is not a prefix of %s", string2,string1);}
* * *

}
int main(void)
{
* * ***** * chaine1[1001], chaine2[1001];
* *** ** ** * * * ** * **
**** *** **** ** * * ** * ****
******** * ** * * ***
* * ** * * * * 0;
}
answered by (-168 points)
0 0
prog.c: In function 'main':
prog.c:37:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[1001]' [-Wformat=]
   scanf("%s\n",&chaine1);
           ^
prog.c:38:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[1001]' [-Wformat=]
   scanf("%s",&chaine2);
           ^
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
* ** * * **
**** * ****** * *
int main(void)
{
** *** ** ***** ****** str1[100],str2[100],i;
*** ** * * * *** * * ** ** * * ***** ** ***** ***
* * ** ** * * ***** ** ****
* ** ** ***** * ** * * * *
****** ** * * **** *** **** * * **** ** * **
*** ** * * ** *** * ** *** * * * * *** * * ** * * *** **** * is not a prefix of %s",str1,str2);
* * * ** * *** **** * ** * ** *** * ***** ** * * * * * *** ** ** * 0;
* ** ** *** ******* * ** *** ** * * * ** * ** *** ** *
* * *** *** ** ***

 printf("%s is a prefix of %s",str1,str2);
** * * * ** * ***** * ** 0;
}
answered by (-304 points)
0 0
prog.c: In function 'main':
prog.c:6:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int *' [-Wformat=]
     scanf("%s%s",str1,str2);
             ^
prog.c:6:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'int *' [-Wformat=]
     scanf("%s%s",str1,str2);
               ^
prog.c:7:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(str1);i++)
               ^~~~~~
prog.c:7:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:15: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:7:22: warning: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types]
     for(i=0;i<strlen(str1);i++)
                      ^~~~
prog.c:7:22: note: expected 'const char *' but argument is of type 'int *'
prog.c:10:23: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int *' [-Wformat=]
             {printf("%s is not a prefix of %s",str1,str2);
                       ^
prog.c:10:45: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'int *' [-Wformat=]
             {printf("%s is not a prefix of %s",str1,str2);
                                             ^
prog.c:15:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int *' [-Wformat=]
  printf("%s is a prefix of %s",str1,str2);
           ^
prog.c:15:29: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'int *' [-Wformat=]
  printf("%s is a prefix of %s",str1,str2);
                             ^
0 0
prog.c: In function 'main':
prog.c:8:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(str1);i++)
               ^~~~~~
prog.c:8:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:15: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
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()
{
* * ** * * * **** * * * str1[100],str2[100];
* * *** *** * * ******* ** i,c=0;
*** ** * *** * ** * ** * ***** ** ** *
* ** ** **** * ** ** * * * ** * ** * * *
** * *** *** ** * * * * * ** ****
** * * **** * *******
* * * ** * ** * * *** ** ** ******** * ** **
** **** * * * * ******* * * * * * ** ** *
* * ** ** * *** * * ** * * ** *** * * * * * * * * **** **** *
* ** *** **** *** ** * * **** ** * *** ** * **
    }
* ** ** ** ** * *** *
* * * ***** ** * *
** ** **** *** ** ** ** ** ** ** *** ** ** * is a prefix of %s",str1,str2);
** ** ** * *** ***
** *** ** * ** * ****
** * * ** * * ******** ** *
********* ***** **** * *** * ** ** *** * *** ** *** is not a prefix of %s",str1,str2);
** ** **
}
answered by (-140 points)
0 0
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(void)
 {
* *** ** * * * * ** **** pre[100],str[100];
** * * ** * **** * ** * * * * i;
* *** * *** ***** * ** *** ** * * * **
* ** **** * * *** ** ** * * *** ** *****
* * **** ** * * ** ******* * * ** **** *
    {
* *** **** ** * * * *** ******** * ** * * * *** *** ** **
* ** ***** * * ** * **** ** **** * *** * ** ** *** ****** **
*** *** ***** ** ** ** ** *** * ** ** * * *** * ** **** ** * *** * *** ** ** * ** ** * * * * * * * ** is a prefix of %s",pre,str);
** *** **** * * *** * * *** * * * * * *** **** ** * * ** ** * ** * ** * *** **
** * *** *** ***** *** * ** * * * * ** * * * * * * ** **** *** * * *
* * ** * ***** ******** *** * * * * * * * * ***** **

* * *** ** * ****** ** * ***** ** * * ** * * * * *** ***
* * ** *** *** ** * ****** * *********** * ***** ** *** * * ** *** * * * ** * ** * ** is not a prefix of %s",pre,str);
* * * **** **** ** ** **** ** * ** * ** * ****** *** * *** * *** ** * ** ** * * *
* ** ** ** *** * * * * **** * *** *** * *** * * * *** ** * *
    }
    return 0;
 }
answered by (-281 points)
0 0
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()
{
** * * * ***** * * * str1[100],str2[100];
** * *********** ** * * * * i,c=0;
** ** ** * * * ** **** * * ** * **** ** ** *
* * *** * * ** ** **** **** **** ** * ** * *
*** * *** ** * * * ** * * ** ** * **
** * ** ** * * ***
*** *** * ** * **** ** **** ** * * **** *** * * *** ******* *
** *** **** *** * **** * * * ***** *** ** * * * *
* * * * * ** ** **** ***** * ******** ***** * * * ** **
** * ** **** ** ***** * * ******* ** ***
    }
** * ** * * * * *
** * * * *** * *****
* * **** * ** ** **** ***** *** *** * ** *** *** is a prefix of %s",str1,str2);
* * * * ** * *
* * ******* * ** * * * * *
** ***** * ***** * * ****
* *** ** * * * *** * * * ** * ** * *** * *** *** is not a prefix of %s",str1,str2);
*** ** * **** *** *
}
answered by (-323 points)
0 0
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 by (-254 points)
0 0
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()
{
** * * * ** ** * * * * n,count;
* ** ** * **** a[100],b[100]={0},c[100]={0};
*** * ** * * **** * ** ** %s",a,b);
* * ** ** *** ** * * ** * *
* * ** ** ** * **** * * *** * *
** **** * * * *** ** ** ** * *
** ** * ** * ** * *
* *** **** * ***** * * ** * ** * ****** * * * * ** * *** ** *
*** ****** **** *** * ***
*** ** ** **** * ** * *** ******* * *** *
**** ****** **** ** * *** (strcmp(a,c)==0)
** * ** * ** **** * **
* * * * * * **** * * **** * *** * * ** * * is a prefix of %s",a,b);
*** *** *** * *** ** **
**** ** * * **** * *
* * * ** * * * *
* ******* * * * * * * ****** *** *** *** *** * is not a prefix of %s",a,b);
* ** * * * * * *
* * *** * * ** ** ** 0;
}
answered by (-229 points)
0 0
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()
{
* * ** * * * * * String[50],string[50];
** * ** ** ** * ******** * a,b=0;
***** ** * * * ** * ** ** * ***** * **
** * ** * *** ** *** * * * ** * ** ** ***

**** * **** ** *** * ** * * * **
* * *** * * * **
* ******** * * ** ** * * * * ** * * * ** * ** **** **
* * ** ** **** *** *** ******* ** ***
*** ***** * ** * ******** *** ** * *** *** * ** * * * **** * * * **
** * ** * *** *** * * *** ** *
    }
* * * * * * ******
* * ** * *** ***
** * *** * **** ** ** *** ** * * * * ******* ** **** ** * ** is a prefix of %s",String,string);
* *** ** ***** ***
* ** **** ** ** * * *
*** * *** ***** **** * **
*** * * ** **** * * *** ******** ** * * ** ** * is not a prefix of %s",String,string);
* * * ** * * * *** *
  return 0;
}
answered by (-107 points)
edited by
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
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include * * * ****
#include * ***** ***

int main()
{
*** ** ** *** ***** ** * a[100],b[100];
** * ** * *** * **** * * * %s",a,b);
** * *** * * ** **** i,j,prefix = 1,len = strlen(a);
* ** * **** *** * * = 0 ; i < len ; i++)
** * ****** * * * **
**** * **** * *** * *** ** ** * *** * * * * != b[i])
*** * * **** **** * *** ** ** * * ** * **
** ** * * **** * ** ***** * *** *** * * ** * * ** ** * * ** *** * * ** = 0;
* ** ** ** ** *** ***** * * ** ****** * * ** * ** * *** ** ** **** * *** is not a prefix of %s",a,b);
* ** ** **** * * *** * *** ********* * *** * * ** * **
* *** * * ** * * *** *** **** *** **** **

* ******* ** **
* * * ** ** ** * ** *** **** == 1)
** ***** * * * ** **** * * * **** ** ****** ** * * is a prefix of %s",a,b);


** *** * * ** * *** 0;
}
answered by (-255 points)
edited by
0 0
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
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.70.130.207
©2016-2025

Related questions

1 like 0 dislike
37 answers
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42302 - Available when: 2018-01-17 14:00 - Due to: Unlimited
| 8.6k views
2 like 0 dislike
31 answers
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42301 - Available when: 2018-01-17 14:00 - Due to: Unlimited
| 7.5k views
1 like 0 dislike
32 answers
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42300 - Available when: 2018-01-17 14:00 - Due to: Unlimited
| 8.7k views
2 like 0 dislike
30 answers
[Exam] asked Jan 16, 2018 in Final Exam
ID: 42298 - Available when: 2018-01-17 14:00 - Due to: Unlimited
| 6.7k views
0 like 0 dislike
4 answers
[Exam] asked Jan 19, 2018 in Final Exam
ID: 43460 - Available when: 2018-01-20 09:00 - Due to: Unlimited
| 1.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users