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;

n= **  *** * *  *

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}

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

int main(){
*  * * * ** * ** * **  * * ** c;
** **  *  *** *        *** **  a[100],b[100];
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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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    }


}
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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'
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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];
*** **    *    **  *   * * * *   **   n ,i;
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   ***  *    **    **  **   ** *** *** **** **** * ** **** * * *** * ** * ***   **
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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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 **  *  *** ** *  **    **   **  * *  len_a = strlen(a);

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  **  ** *** ***   *  **** **    ******** ***
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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]={};
 * * ** *** *       *  ****  *** *   *** %s",p,s);
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 ** *  * *  * * *    ***  **  *  *** * **
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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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 ** *    * **  * *  *  * ** **  ***  ***  *  **   *** * **** **  * * *   * ******   ***** ***    **   *    ****  * **  *   ** *  * *** ** *   ***** *   is not a prefix of %s",a,b);
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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;
*    ******   * ** *   *  * *  *** 
*  *  * *** ***   *** ** **       * ** ** * * *  * 
 *  ** **     * * ****** *  **   *     ***    ****  ** *  **  * 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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