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;

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if (cnt == n){
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}

int main()
{
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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
*  *   ***  *   * *  *** ***  ****** c;
   **   **** ****  * *  **  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()
{
* *  ** *    ***  ***  n,count;
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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()
{
*  *   **  ***   *** **  **** ** a[100],b[100];
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**   *  * * **  *****  **** * *** * ****  *   * **  *    * ** * *  *  is a prefix of %s",a,b);


    }


}
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'
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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];
 ****      *  *  *    *  ****   word[100];
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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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 ************  ***  ***   ** ******   *   **     ****   *  **      ** **  *    ****
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  *       *           ** 
*   *  *** ** * * *** ** *   **   ***** *    *   ***   *   ** * *** ***  * * *  * **  ***

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

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

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

    * *   **    ** * *     *  ***  %s", a, b);

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

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

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

****  ******   ****     **  = 0; i < len_a; i++)
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  *   * * ** ***  *  *  ***    * **** ** *  *  * *  *
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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]={};
  **   *** ** *     **    *  ** * **** %s",p,s);
** *  *  *   **  ** * *     * * 
****        ***    **  *      *** ** **  
***  *   * **  **** * ** *    **   ****  ***   
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     **  *  ***    * ****    **  * ** **   ****  *******  **     is a prefix of %s",p,s);
 ** ***  ****** ** * * **  
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 ***   ** **   ** * * *   * ** * * ****   **   *  ** ***    *  is not a prefix of %s",p,s);
** **  *  *  * **     
*   * *   **   *  *   * *** *      * ** **     ** ** * * * ** 
    ****  *  * ** **** ** * *   **   0;
}
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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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  ******  *  *   *** * *   *  ** ***  *   * **  *   * *   *  *      ** * *** ** *  ** * **         **  *     *   *****  *  *** * * ***   * ** *
**  *    ** **  *** ** **   **** * **  *    ***  * ** *   *   * * **** ** **  **   *  ** *  *  **   ***  * 
 * **   ***  *  * ************** * *         * * *
}
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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;
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 *  *****    *** ** *  ** ***** **  **  ******* **
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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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