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

int main()
{
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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];
** * *   *         * ***         **  * %s",a,b);
* * * *   **  ***  ****  ****      ***  *
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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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*     * ***   * *  **  ** * *    ** * ** *** ** **  **  **  *  **    **  is not a prefix of %s",a,b);

    }
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  ** *  *  * *  * *     *  ** * * *  ** ** *       * * 
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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'
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];
** ** *** *  **  *  * **** *  *    ****     %s",pre,word);
* **  **** * * *****   *** ** *      
** ***   ** *  ** ****** *** ***   * *  * * * 

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

  ***     ** **  *  *  **
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];
****  * **  ****   *  *    *  n ,i;
 **** * * *  ** * *     *    *  ***  *
  *******   **   ****** *   * **  ***  *  *
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*****  *  **** *    ****** *       *   * **  *    *  ** *      *  ***  ** **  *   **  * * * is a prefix of %s",pre,a);
  ** * **  ***    * ******* **    * *   *       * *  *  * * **  ****   *  ****** **** 
 *** * **  **   *   *   * ****     * ****   * *   *****  * ******  **** **** * *  ****  * *   *  ** *    ****  *  * *** * is not a prefix of %s",pre,a);return 0;
 * *   **   * *   **      * 
  *******  **** *****    ** **  * *** **   * *   * ***   **  *    **  * ****  *

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

* ** ****  ****  * ** *  *   *    == 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);
  **  * * *** * * ** *   *  *** * 
  *  *******  *****     *   * ****
    **  * *** *  * * **** **    **  * *   **** *  
 **** ******** *    ***  ****** **
 *     * * * *  ****  * *  **   *  ** *   *** **** *** ** * *   * *  *   is a prefix of %s",p,s);
*  *   **   *   *** * **
**  * ** **  * ** ** **  * ** 
** **    *  *   **  * * *    * **  **  *** ***  *****    ** *****     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])
*     * *  **  *    **  **  ** ** **** *   ** *   * ** **       ***** * **  ********* *** **  **  *    ***  * **
 **** *  ** ***   **** * *    **    ** *** *    ****  * *  **      * ***  ** **  *   ** * *       *   ** *****  ***  *** *  **  ***** 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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