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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if (cnt == n){
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****  **  ****  * * ** *** **
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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];
    * *  * ***  ** *    *       *   %s",a,b);
** * *   *** * *  *  * ** ******* * * *** 
*  * *   ***  *  * ***  * **  * * *** **       *       ***     0;
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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];
 ***   * * *** * ** * * ****    * * * *  *  **** 
    int l1,l2;
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*  ** * * * **********   *  ** *     *  ***   *  * ** *** ** is not a prefix of %s",a,b);

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

 * * *  *** *  * **    * * **** pre[100];
 ***  *  * **   * *** ****  ***    word[100];
** * *  ***   ** *  *  *  ***  **   %s",pre,word);
 **** ***     ** * * * *  * **  **** *  *
       **   ** * ***   ****  * * ***

** *** *   * *** *** * *  *      i;
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 ***  *  *   *******  **    * **  ** *     ** *** ***   ****  * **  ** ** * **   ** is not a prefix of %s",pre,word);
*****   ** *  * *   *  *** ** ********* * **********  * * * ** * *    * * 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);
* ** * **  *   * ** *  * *  ** *  *  ** 
*    *     *         **  *    **  *  *   
*   *** * *    *   ******    * *  *** * *  *  *
   *********** *   ***      *  ** * * *  *
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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++)
   * * ** ***   * * ***   *     *** *****   ****   **   *
 **  * * * ** * ******  * * * * *   *   *****    *  ** * *   **  *  *  * **** != 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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