1 like 0 dislike
8.5k 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 | 8.5k 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:172.71.254.191
©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
| 8.8k 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
| 7.7k 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
| 8.9k 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
| 6.9k 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