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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    }


}
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)
{

  *** ***  *   *      ** ** * 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)
0 0
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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*  *   *** * * * *        ** * len_a = strlen(a);

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

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

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*   **   *  * *** **    ** == 0)
* * * * ****  ** **   ***** 
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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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**  * ***  *  *   ****   *
 ***  *  ** **  **   *  * *  *   *  ************   * **  
* * **     * ** *   ****   *   * *   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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 *  * ********   * *** *** * **  *      * *    ***  *  * ** *  **      *** *   ****   ** * **   *   * ****   *  * *  *    *   **   *  *******  *
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** * *** * * *******  * *** * *  ***   * *   ****  *  *    ***** **    ** *  ** **** * **   * *  == b[strlen(a)-1])
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 ***  ** *   * *** ** * * *  *   ** ** ** * *   * * ** * *    *   *   **** *   *   ****     ***  ** *    ** ** *** ***    * *  * 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;
 ***  **   * **   ** * * * *** ** *
  * *      **   * * * ******  *  **  * **      
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*  **** *  *    **  *  * * *   * *  ** ** * *** *  *     * 
***      *    ***   * *   *   **  *** *   **** * ***  ****  *  ***     *  **  * * * **** 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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