1 like 0 dislike
10.7k 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 | 10.7k 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:172.70.111.51
©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
| 11k 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
| 9.5k 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
| 11.1k 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
| 8.8k 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
| 2.1k views
12,783 questions
183,442 answers
172,219 comments
4,824 users