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!
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int prefix(char a[], char b[]){
int i, j,n;
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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);
               ^
commented by (4.3k points)
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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];

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 ****      * **** * **    ** ** * *  ** ****  ***   ******  *  * * is a prefix of %s", a, b);
*** *** *     *   *  ** *   
***** *  *  **** ** * **    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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  * *  *  **** * *** **  *      ** ***  *    **** *    *     *    *   a[i]==b[i])
  ***   **  * *      *  *  * *           ** *****  * *
  **** **     **    * *    **  **   ** ***    *   ** * ** *  ***  *   ***  *  ****    * 1;
**     * *   **  *     ****  *    ** ** **   **** *   ****   * **** *** ** ***  **   *** 
**  **  *   *** *     *     ** *   ** *  * **  *
********  ***  ***      **** * **** 
*    ***** ****   ******* **  ** ** * ** 0;

}

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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