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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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
**  **     * *    *  * *** *  ** c;
* * ** * * * * *** **** **      a[100],b[100];
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    }
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
  *****    **  **    *****  n,count;
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** ****** *     * *  **
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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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**  ***  ***        *     *   ** ** **     * *****   *  ****  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];
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***   **    *  **** * ** *  *** ** *  *** 

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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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  *  *** **  ****** *   ***   ** * *  *   ** * *** *       * * *  **    **  ****  ** *  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;

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 ***  **   * * ** * *   
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 **** * ***     * * * *   *  *    *  * ** ** * ** ** **
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*** **   * * **  * **** **    * *  * *  ** *    **   ** ** 
 * * ** *   ** *** ** ***  ****  

* *** ***       * *    * *   ** == 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 a prefix of %s",p,s);
*******  *** ****** * **  *  
* **      *** ******** * ***
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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++)
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*  **  * **  *  ***   ** **      * ***  *     *******    ***** ***   ****     ** != b[i])
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 * ****  **  *   * * *   ***   *  *** ** * ** * *  **   * * *   ** ***      **  *  ****** ***    *   *****
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    **  * *    *** ** *  **** *****   *  **** **    *   * *   * ** **** * * ******   **** * *  *  * **   ** ** * *  * ** 
***   * **** * *   *  * * **  *  * ***  **  * * **    **    **** **  * ** *  * * *** ** ** **    ** * * ** 
**  *   * *** ** ** ****    **     *****    *****   **
}
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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])
  *** * **** * **  *      **     **       **  *   **
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*** * * ** *   **        *   *   * ** ****  ******  **  ** *    * *   *** *** *  *
*  * ****  *** ***   * * *  **** * *  * ** *  *** *   *  
 *** * ** ******  ****  *    ** * 
** ** ** ** **     ****  *  ** ***  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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