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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n=  * ** * **

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if (cnt == n){
**     *   * ******* *** **  *     * ** * *****  * **** 1;
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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()
{
*  **  * **  *   * **  *** *** * n,count;
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** *  ** * *  *  ***** **   * *
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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];
******  ** ***  * ** *   *  word[100];
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* * **    *     ** ** ***  ** ** ***   ****   **  

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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];

***  *   ** **  *   **    *      **  * %s", a, b);

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 ** * *** **   *** *** * *  *       i = 0;

 *  **** **   * *  ** *** *  * flag = 1;

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 ******* **   *  *    * *  ** ***  ** *   * **** * * **  * ***    ***  *** **    = 0;
  *  * *     *   *    *   ** * *** * *  * *  * **** ** *  * *
   * *  ** *     * *****  * 

 *  **  * *  ******    **  ** * *** == 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]={};
 * **  *** **** *  **     *   ***** * *  ** %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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* * *    * *      ** *    * **  ***** * * **   * * *     ***   **** ** **** ** ****   != b[i])
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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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