1 like 0 dislike
10.6k 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 | 10.6k 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:172.71.255.49
©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
| 10.9k 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