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){
*  *  ***  * * *** *  *  * ** * ** ** ****** *  *  ** * *** 1;
**     *** ** *  ** **   **  *  *** ***** * **** ** **  **
* *  ***    *     * *  ** 
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}

int main()
{
**  **   * **      *** ** s1[100], s2[100];
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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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    }
** * **   * * * * * *   **  ****** 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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**** * *    * ** * ******      * * *  * * ** ** * **  *** *   ** *** ***     **** (a[i]!=b[i]){
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*** * ** ** * *       * * * *     * * ** **  *   ******* *  *   *** is a prefix of %s",a,b);


    }


}
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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)
0 0
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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    *  * * *** **   * ** **  **   **   * * ****
** * *   **  * *  *   * * **  **  *    **

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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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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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*  *  ****    ** * ** *     **   **********   * ** *   *** *   **      **  **  *  ** (pre[n]==a[n])
 ** * **** ****   ***  * **   *****  * ** * ** ** ****      ****   **  **  ***     ***  * ***  *** *    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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 ** * * **   *****  ****  *  ***** * * ******** *   
*       ****   ** * ***       *    **  *  *
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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++)
  *     * ** * *  *** *** *   * **** *******  * *** **  * 
  **  **** * *** * *   ****    **    ****  * ******  ** *   * *** * * *****  * *   != 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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