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(){
*           * *** ****  c;
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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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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);
               ^
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)
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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];

******  **** *     * *  * *** * b[100];

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

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

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*   *     * **  ** *** ** ** 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]={};
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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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*  * **      ** ** *  **** ****  ** *     * * ***  * * * 
}
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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])
* *    * *   ***  ***  ***    ** * **   * **  *  *** *
 * * * *  *** **   **  *  **  *   * *****   **   *    *   *  *    * ***    ****  ** *  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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