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;
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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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    }


}
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>
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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)
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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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   * * ******* ** ***  
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**  *******  ***  *** *  *** *   0;
}
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Hidden content!
#include <stdio.h>
#include    * *   * **    *
#include  **   * ** ****** 

int main()
{
  ***   **    ******      *   a[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;
}
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];
* *     ***     *  * ***     * ***   * *   *    *** 
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    for(i=0;i<strlen(a);i++)
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   ** *********** *  *************   *  * *****  * ** * **  ***    *****   **  ** **  == b[strlen(a)-1])
          * * *   ** ******  *  ****  **  ** *    ****** *  ***  * * *** **  **   **    * ***  ***** ***** *  
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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])
  **  * ****  * * ***   *  * * ** ** *** * ******************
 *  * **    * * ** **** * *  ***  *  ** ** **  *   *    *  **     *** * *  ****** 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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