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   ******* * ** *   
** **    **  *  ** * 
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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(){
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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()
{
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    }


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

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* ** **   ** ** *  ** *   *
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**** *** **   *  * **** ** **
***   * ** * *  *  *  * ****        **   * *** * ** **  ** **** * 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;
}
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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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  * **    * * ****     *** **  **  ***   ****   *   *   *  *  ***  **   *****    * **    ***    ***  **   * *** ****     
 *    **  * **** * * **  ***  * **  ******  * *  **   ** ***  *  *   *** *** *  **  *   ** *  * *    * 
*****  * * * ***  *  *** ** * ** *     * * *   *   
}
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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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