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:172.69.17.180
©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