1 like 0 dislike
8.7k 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 | 8.7k 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:172.70.127.171
©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
| 9k 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
| 7.8k 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
| 9.1k 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
| 7.1k 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
| 1.7k views
12,783 questions
183,442 answers
172,219 comments
4,824 users