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

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

n=    ** *   ** *  * 

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

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

*  *  *  *  * ***  ** * *     pre[100];
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  *  * **  **     *** ** * **  **  * * ***  ****   **

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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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* * **   **** * * *   ** len_a = strlen(a);

*  * *  *** ** * ****  * ***** i = 0;

   * * ** ** *   ***   * **  ** flag = 1;

 *  ****  **** ** *   ** * * = 0; i < len_a; i++)
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 *** * * **  *   ***  *** **    * *  *   **    * * * * **    *** ****    *   ***  = 0;
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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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 ** * * ** *  **  * *  ** *
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 *   **** *  **    * * * * *      **   ** * *****  *   **      * **  is not a prefix of %s",p,s);
 *****    *     ** *** 
 ** ***         * **** *    *** *  ** * *  * *  ****  ** **
** ***  * ** **   *    * ** *       0;
}
answered by (54 points)
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char a[100];
    char b[100];
* ***   *** *** ****  ***  ** *  * ** * * ** 
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
***** * *****  ** *   ****** **** **  ** **  * ** * *
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  **  * *  **** * *** **  **** ***  *    ** * **    *   *** *  * *  **  *** ***  * *   ***  ***  *   * * **  
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*  *** * ****      *    **  *  ** * *  ** *   ***  *   *****  ******* **     *  ** ****** *   *  *******    *  ** ***         * ** *** 
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 **      *          * * **   ** *    **  * * *    *   ***  *  * ** **   *   **  *** ***   *** *  *** == b[strlen(a)-1])
 *   ****  * *** *   ** *  * **    * *  ****      * * *         * **  **  *    * *** *  *   *    * *****  
 ** ** * *   * *    *  * * *  *     *** * *   ** *  *** *    **      *    ** *** *  * *  ***   * *  *  ***   *****  ** ** *  **    * **   * * *    ** is a prefix of %s",a,b);
*   ** * **  ** * ***** **     * ** *** **** *  * *  * *    * ****** ** ***  ***  ** **   *      *        *  * *   ** * *  * *       ** * *  **  
 ** *   *    ***** *  **    * *   *   ** *  ** * ***** * **     ***** *** ***  *** *** ****     *  ** * ** *  *
 ** **   **    * *  *  *  *  **  **    *   ** *  *  *  * * *   *
}
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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;
*   **     * * * ** ****        (a[0]!=b[0]){
 *** *** ** ****       ** **     ******   ****** *  *    *  *  0;
 * * ** * * ** * *    * ***** **   *
  * * *  *  *    *  *   ***     * ******    *  * 
** *  *** **  ***  ** ****   ** ** ** **   *   **** **  * *** *  * *   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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