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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*   *  * *  *  * **  *  * * *     == b[i]){
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*  * * *** *    **   ** ***

******** **      * *
if (cnt == n){
  ** * *   **  * * **   **  ** ** ** **  *  *   ****    1;
* ***  ***  ***   * * *** **  *   **    **      * * *  
*  *   * ** **  * **        *
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}

int main()
{
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* **  *    *  ** * *** * ** i,j;

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*  ** * *  ****    *    ***    ****  **  ** * *     *   * **   * ***   ***     ****     is not a prefix of %s", s1,s2);



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


}
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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];
 * ***  **    * **   **   * * ** ** word[100];
** *    ****** *  ***   *  ***  * %s",pre,word);
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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];
**   * *********  *   * **   * *** n ,i;
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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)
* ** *     * *** * *** * **
******   ********** **** * ******  *********    **   ** ** * * ***  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]={};
*  *  *   *  *** ***  ** *   * * *  %s",p,s);
  * * *  ** * * ** ****** **  
** **     **** * *  *  ** ** * *   *  * * * *
 *** ****  * **   ** ***    *  *  ***** *  *** **
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* * * *    *** *  *     
  ** *** *  **  *  **     *
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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];
 ***** ****    *      *** * *     **** ****  * 
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
  * *  * ***           *****  ***  ****  ***** ****  *
  ***   *  * ** **  *   *   *    * *  * *  **   ***** ******  ***   * *  ** * *** *     *  != b[i])
******** *  **  ** *   * ****  **    * *    *  *  ****     * *****  **  * * *  *    *      ***** *   **** * ******  *
*      ****    *   * *** ** *    * * *  * **     *  **  ** ** * * ***   * ****  *   * *     *  *   ** * ****   *   ** * *   ** *  ***  ***   *    *    **  *  is not a prefix of %s",a,b);
****    * ** ***    **   *  *     * *****  * ***** *  * *     *  ** *****   *  *   *    * *****  *** * *   *  *    ***  ** *      * *  *  ***** 
*   * * ** ** *         * ****** *   **  ** * ** * ** **  *** ** *** *  ** ** *   **   **   **  * **   
* * ** *  *  *  *** *** ****   ** * *  * *  *     * **  * *  **  ** * * * ** *   *** *******  * * == 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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