1 like 0 dislike
10.2k 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 | 10.2k 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:172.70.100.72
©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
| 10.6k 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
| 9.2k 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
| 10.6k 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
| 8.3k 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
| 2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users