1-11 Exercise 3: Prefix of a string

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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

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
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#include<stdio.h>
#include<string.h>
char prefix(char string1[],char string2[])
{
    int i,s;
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    {
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    }
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    {
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    }
}
int main (void)
{
    char chaine1[1001], chaine2[1001];
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 **   *      *    ***  ** ****    **  * **  
* *  * ** ** **   *  * **  **   0;
}
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#include <stdio.h>

#include <string.h>

int main()
{
   ***   ******* *** ***   **    * lenght1,lenght2,c;
      **  *  **     **  * * b[100];
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 **          *   **   *      *
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 **    * * ***** ****    *      *  ***     * *** ********  * * is not a prefix of %s",a,b);
**    * * ** * *   **** 
* *  ** * *** *****      * * 0;
}
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Hidden content!
#include <stdio.h>
#include *  * *  *  ***    
#include  ** *  * *
//#include <ctype.h>
#define n 100
int aa(char A[],char B[])
{
* **   *** *** i;
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  {
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  }
*  ****  *** * * * *  1;
}


int main()
{
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**  **  *  ***   *     **  ***   *** ***   * *** * **** ****  ***** is not a prefix of %s",a,b);
*  ** ***** **  **   *   *******   0;
}
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Hidden content!
#include *      *  **
*    *    * **    *  * *
int main (){
char *** ** 
char **   *  
** * * *** ****  string1:  ***   *** *
 ***  * *** *  * ** ***   *  
* *    *     string2: *      *  
**   *****   *** *      **
 ***  *      *        ***
* ** ** *  **  * **  *   **  *  *  *   * * is ** *  * *** of **   **   *   ** 
else
 * *  **  ***    ********  **    **** * *   * is not prefix of   *** ***   *** *  

return 0;
}
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prog.c: In function 'main':
prog.c:7:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
 scanf("%s",&string1);
         ^
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Hidden content!
#include *** ** ***    * *
#include **  *   ***   
#include    *** * *     * 
#include  *  * **   **   
int prefix(char p[],char s[])
{
* * *   * *  * **  * ** ** *  *** * * * * *
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** *  ***  *   **  *   **  if  * **  **   *  * 
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* *** **    * * *
 **  * *   * **   *  **   ** * 0;
}

int main()
{
     **** *     * *  * ***  p[999],s[999];
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  * * *  **   * * *    ***  ***
**   **** * *** ** ** ** **  *****  *  * * is a prefix of %s",p,s);
   *  **  **   *  * * * *
**   *  *  *****   **      ** ** **  is not a prefix of  *  *   ***   *

 * ****  ** *** **** 0;
}
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Hidden content!
#include <stdio.h>
#include ** ***          **   
int main()
{
*** *      **  ** *    *   length1,length2,c;
** * **  *  ** *    *** *  *    * a[100];
 *  *      *   ***   **** *    b[100];
  *  * *    ****** ********* ** *** d[100];
 **** **   * ** *  **  * * ** ** **** ** * * *  *  * 
   *      * *  *  *   **  * * * *   **     *
   * ****  * *    **     ***    ** * 
    * ***  **********    **  *    ** * 
if (strcmp(a,d)==0)
*       **   ** *** * *   * 
* *   *   **   **** **   * **  ***** *    ** *******  ** * ***  *  **  *  is a prefix of %s",a,b);
* * * *  * * ** * * * * *  *
*   * *      **** **** **  ** *
** *     * ***  *  ****       
** *   *** **  ** * ** *  ****  ** ***     * ***    ***** ***** ** is not a prefix of %s",a,b);
****  ****     ***  
*  * ***  **   **** 0;
}
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Hidden content!
#include   ******* *******  
#include     **  ** *   ***

int prefix (char ** *  * str2[])
{
*     ** *     * **     * **** ***  length=0, **   * *
  **   * ** *     **** **
* ***      **** ***   *    **   =    **  *   **  * 
  *   *   **** ***** *     
*  *      ** ** ** **    ***** * *  ***    **   
    * **  * * * * * ** *   **** ** ** **  *
    * * **  *** ** * ***  * * *   * if  * * ** ** * 
**  * *  * *  ** *  *          **  *     *  *   **    
****  *  * * *  **   *****  * **    *   }
* **  *            *  *   *** * **  * * 
  ****    *    **   **** *  (count == length)
********  ***   * *     *  **  **   * * * *** 1;
 **  *  ** * ******    **   * else  ** *** *** * 0; *   **      *   * **    
 * ***  *   *** *      * ** *   
}
int main(void)
{
 ** * *  ** * **   *  * **   ***    ***  *
 * * ***    * *   *  ** 
   * **  *** ** * *** ***  **********     ***    str1, str2);

 * **  *  *  ***  * * **   ****   * * ** * 
 * *   *  **   *  {
  ****  *** **  ***   ***   *** * *    **     ** ****   **** *  *   is a prefix of  ** *    * str1, str2);
  * *** *  ***** ***     *
**** *        *****  * ** * *     
** ** *******  *    * **** *  ****  ***  ** * **** ***    *** is not a prefix of **  *  str1, str2);

*  ** *** **** *  *  ** ** ** 0;
}
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#include **  **** *  *  * 
#include ***  *****     * 
#include *  *   ***** ****

int main()
{
*  ** **  ** *  **  ****      * *  prefix[100];
  * *    ***   ** ****   *  word[100];
 * * ** ***  * *  ** * ** **  ***** * %s", prefix, word);
* *   * **  *  * *     * i;
*  * **  *  *      * *** *  ** = 0; i< strlen(prefix); ++i)
 * * * * ***** *   *  ** * *  
  * *** * * *   ***  **** *  *  **** *   **   *  **     ***    *  *   
** *  *** * * ***  *****  * *   *****   * * * ****  * * *
* *     *****  * ** *   * ** *   **** *       ***   *  *** ****   **   **   **  * * *   * is not a prefix of %s", prefix, word);
 *    *  ** **   ****  * ** *  ** ***  * * *  ** **** ** * *** ***  **** *** * * 0;
* **    ***  ** ** **       *  ***  **** * *
 *  *** **  *****  **** 
  **    *    *  *   * *  ****  ****  ** is a prefix of %s", prefix, word);
***  *   **   ** *** * *  *    0;
}
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#include ** ** **  ** **  
#include      * * * *   *
#include **    **   

int main()
{
**** * *  *   *   *  ******** *   prefix[100];
** *** ****  *   * * *    *   word[100];
* *  **** *** ****   *  *  *  *  *    ** %s", prefix, word);
**  *** ** * *     *** **** i;
****  **  **  * * *  *  **  * = 0; i< strlen(prefix); ++i)
 *** * ** *   * * **  **  ****
*** ****   *  **    *    ***  **  *** **     **    *** *    * **  **
** *   **** *   ***   *   * *  **** ** *****  ** * *** ** * 
   **   *  **      *****  *   * **  *      * **** **   ****    **   * ** **** **  *  **    is not a prefix of %s", prefix, word);
 *   ** *****  **** ***  **** ***  ** * * *** ** ** *** * * *  * ** ** * * *   *** *** ****  0;
*  *** * **       ***    **** * ** ***   *  ** *** *
 ***  **** *    *   * *** *** * 
    *       **      ***  ****   **  is a prefix of %s", prefix, word);
 * *  *  ** ***  ** *      *   *  0;
}
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** *  ** ** **   ** ***
 * * *** * * ** * **   
* **    *    **   *   * 

int main()
{
*** * **  *** * char     
*      **  * *    char      *
*  ***  * * *** * ** *  * **   *  * *  * **  word);
  * **    ****   int i;
******* *  **    for(i = 0;  *    ****   *** ++i)
   * * * *  * {
****   *   ** ** ** ** ** ****  *  *  *  **  ***
  *****     *   **  * ** **** {
   **  * *   * ***  *  ** * **    ** *  *   * ** *      is not a  ** * of  *** **** *** word);
**** *    ** *  *   **    ** *   *** *  *  * **   * * 0;
 ***      * * *  *  **  * * * }
   **  * **** }
  ***   **** ***** *  * is a prefix of ***  *  *     *** word);
****    * **   *    * 0;
}
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