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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}

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

int main(){
  *** **   ** ****    ***** c;
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    }
 *  *********     * * * **   ***  0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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*    ** ****   **  **   **  * *   0;
}
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);
               ^
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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* *  * ** ***    * * *    *
**    ** *    ***** *** *  **********    **   * *       *** *  * ****** * *  * *  **  *

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

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  ***   ** **  **** * * ***   * *
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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;
}
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++)
*   ** **   *  ****** * ** * *******  *  ***   **  ****
*  *  **    *   ****  * *   *   **  **  ***   ***   ***   *  **  * * *** * ** * * * != b[i])
 ** ******  * * *  ***** ** *   ****     * *** **  * *  **** *    *****   ****  **  **   ***   *** * *
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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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