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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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()
{
***  *  * * *****   *   *** n,count;
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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)
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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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  * *  ***    ** ******** * 
 * * *  ** * *  *** * **** * **** * * * **  * *** ********   ***   ** ***  ***  **

  * ** * * **  * *********** ** ** * 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;
}
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[i])
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* *  ***   **    * **  **** ***  * *  *    * *   *    * ** * *****   ** ** *   ** * **   ** *     *    *****  *  * *  ****  * *  ***      is not a prefix of %s",a,b);
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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;
* ***   ***   **** * * * * ***   **
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* ** * * **  *****   **  * *** ** *  * **          **     *  *** 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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