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

int main(){
*** *** *****      *      ****  c;
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    }
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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}
answered by (-284 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 %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()
{
* **   *** **  ***   ***     a[100],b[100];
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    }


}
answered by (-329 points)
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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];

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*   ** **  **  *        * *  **  *** *  ** *  *  **
*   ** *  ** * *  *     *

   ** * *  **    ***  **** == 0)
******  * *     **** *  *  *
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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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    for(i=0;i<strlen(a);i++)
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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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* *  *   *  * *****  * * *** *    **    *  *    ****** 0;
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* * *        ********  *** ** ***  **   * *   * **     ** *** *    a[i]==b[i])
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   *  * **** ***  **** *  *********** ** **  ** * *   * *  * * *    *** ******** ***  *** 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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