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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*** **  **   ** * * 
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int prefix(char a[], char b[]){
int i, j,n;
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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()
{
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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);
               ^
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Hidden content!
#include<stdio.h>
      *  * * *  *  
int main(void)
{

********** ***  ***  *     * *** pre[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];
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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)
****** ** **  ** *****  * 
***  ****      *    **** *    * ** ****  * * **   * ****  * * 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]={};
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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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 ** ** ****    *   **    *   **  **     ** *  * *     * ***  ***  ***     ***** * **     *******    ** * * * *  * *
* *  * **   * **  ***** ****   **   *** * *   * ***    * *   * *     * **  * *   *  *** *** ** ****          **  **   ***  ***  ******* * * 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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