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!
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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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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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}
answered by (-284 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 %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)
{

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

int main()
{
**  *   * **  * * * * *** ** ** a[100];

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

* ***** *  *  ****  *     *** *   == 0)
** * **  *   ***   ***
    ** *  * ******** *    ** *   * * **   * ********   *  ** * * **     is not a prefix of %s", a, b);
* *** ** *** *   ***    
 * * * * *  * *** *  ** ** **  
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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];
    ** * * ***  **** *   **  *   *** *  **  * **  *
    scanf("%s",b);
    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;
**** * ***      *  * * *    *
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*   * ****** *  * *   **** *** *   ****     *** * * **   * ** *** **** * *  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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