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:172.70.130.210
©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