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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

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

int main(){
    ** *   *  * *** *   *    **  c;
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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()
{
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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)
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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*  *  *    **   ** ****** *
**    *     **  **  ***   *  *****   ****  *** *** ** ****       *** *** * * * *  * 

  *  * ****    **  **  *   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++)
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  ** ** *** ***   ***** *  * *  **    *  * * * *  * ***      * **     **  *** *** **** ** ** ** **** **          **    * ***   *   *  * 
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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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