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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}

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];
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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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}
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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    * *   * *     *****     ***   *  ** ** ****** ***     *  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);
* *  * *   **   ***   *  *   * *** ** *  
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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];
* *** ** *   ** * * ** * * 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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**  * *  **      * *  **  * **** *  **    * ***  *    ***
* *    **   *     **** **    *   **     ******    *    ***  * * **  *   *   *  = 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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*      *** **   ***** *****
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 ****  * * *  * *** *** 
****  ***    * *  * *** ** ****  *** * **  * ****   ***     
*  *   * ** ** **  * * ** * **   *  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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