Final Exam 2 (20%)

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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
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Hidden content!
#include ** **  ** **   * 
#include   *  **  * *  *  *
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*** ** ** * *  ***   **

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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}
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
             ^
prog.c:8:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
                ^
prog.c:10:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(prefix);++i)
               ^~~~~~
prog.c:10:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:10:15: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:18:6: error: expected '(' before 'printf'
      printf("%s is a prefix of %s",prefix,word);
      ^~~~~~
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
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    }


}
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prog.c: In function 'main':
prog.c:5:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:5:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
prog.c:7:8: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     l1=strlen(a);
        ^~~~~~
prog.c:7:8: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:8: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:6:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:6:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
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Hidden content!
#include<stdio.h>
 **  *   **    *  *  
int main(void)
{

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printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
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Hidden content!
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()
{
*****  * * ** * ***    *  * pre [100],a[100];
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*** *  **  **** ******* ** * ***        * *****   *    *** *  **  ***        ** * 

*    **       *    *   * * ***  ** 0;
}
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Hidden content!
#include <stdio.h>
#include * **    *     
#include ****** **  * * 

int main()
{
** * *  *  **     * ** * **      a[100];

* ** * * ****  **   **  * * b[100];

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 ** * *  *** *** * ***** * *   
   ***     * *  **  *  ***** * *  0;
}
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Hidden content!
#include<stdio.h>
*** ***** *   ** 
int main()
{
 **  * * * **** *  ** *** *   *  i,n;
* * **  ** *  ** *** ***** * p[100],s[100],a[100]={};
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    ** *  ***   ** * ** *******     *  * **  *** ** * *  *  *
* * ***  *   ** ****  **  * *** 0;
}
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char a[100];
    char b[100];
** *** ** *** ***    *** ** * *   *  *  *** **  *  **
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**    **  *** *  **  **  **    *****  * * *  *** * *  **  **
}
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Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define n 100

int aa(char a[],char b[]){
*   ** **   **  ***  ***     *   *** i;
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** **  ** ***   *  **** *   *  *** *   *** **     * * **** **  ** * *  *     *  *** **** 1;
*  ** * ** **   ****  * *****   *** **  * * **  *** * *     *  ** *  ********* ** * *  *  
** * **        *  ***   *  ****  ** ** *** * * *  * * 
*     * *            * * *  * **  *** 
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}

int main(){
 *    ****  *   *     **** ** c[n],d[n],e[n];
*   *   *  ** *  *****  * ***    i;
*  * **    *  * *  **  ** **  *      **** *  *  * %s",c,d);

** ***   **** *** *** * *  * ** 
* ***** *  ********** **   **** * *   * **  ****** *  **       * **  is a prefix of %s",c,d);

***   ** * * * ********* *** ** *
** * *   * ** ****  * ***   ***  ** *  *** * ****   ****   is not a prefix of %s",c,d);


}
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