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

int main(){
*  **  ***  * *   **  * * ***  c;
 *    *   *   * * *  *   *  **** a[100],b[100];
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    }
  ***   *   * *   **  *  * * 0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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*** * **  * **** * *    * ***   ** **   **** * ***
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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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    }


}
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);
               ^
commented by (4.3k points)
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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)
0 0
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);

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*  *     * **   **  **   ** * *  * = 0; i < len_a; i++)
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  * **  ***  **  *  ***     

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     ***          *  
****  *       **  * ****  *  *** * ******* ***  * ***  is not a prefix of %s", a, b);
* ****       * ** **   ******  
***     *  *   **  ******* * * *
* **** **    *     **  ***  *** 
**     *    ** *  ** ******* * ** ** * * ****  * **   * *    * ****  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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 *** *  **  ** ****  **      
   ** ***  * ** * ****  ** **  *    *  * **** ** *  
**   *  *** *  ***   *  * * ** * 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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*  *  *           ***     *  * * ** *  * **   * * **  **   **     ****** *  *  ** **  == b[strlen(a)-1])
  ** * * **  **     **  *  **  ** *  **  *  *   **** *  *  * *  *     ** ** ** ** *  *  * * **    
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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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*       ********** **  * ** * ** *  * ** *****    ****
 * *   ***   ***    *     * * *  * *  **** *   *****      **  *   **    ****   ****    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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