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;
 ** **  ** ** ** ** ****   
*  ****  *         **      * ** ** *         * *** * * * ***
    {
* * *  * *        *  **        *      **  *    * ** **   (i=0; i<=strlen(string2)-1;i++)
***  *  *  * **     **  *  * *  **     * * **  **    *  *  *    
** * *      *  **  ****  *   * * * * **      **** **   *  **   *  * **    * (string2[i]==string1[i])
** * *** *  **  *  *     **** *  * *    *** ***  * ** **  *     ** * *** *   ** ** * *
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*  ***  *  * ***   ***  **** *   *   **  *** **    *   * ** ** *  
**** *  **  * * * *       * *   * ***  **     * *** *  **
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    }
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    {
* *** * **   ** ** ***  ** *****  **    ****   * *****  (i=0; i<=strlen(string1)-1;i++)
    * ** *  ** *    ***  * *  * * ******* *   *  * *** * *
* * *** **    *     ** ** **    *  **  *** *   ** * * * * * **   * *     *  **  (string2[i]==string1[i])
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* ** *  ***   **     * ** *  **  ** *   *     * *  *  * ** 
**  *****  *** ** ** ****** **    ** **   *     
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 *  *    * *   *   * * *    * ** *      *  ** ** *
*** ****    * *     * * * ** ***  *  *   * * **** *   *
 *   *** *   *     ***** * ** *  *** * * *  * * *   *  ***
       * *    ****       ** *   **  ** ***** * * **    *  ********* *** **   *  *  *  **   **  is not a prefix of %s", string1, string2);
   **   ** *** **     **  ****** ***    ***  **  ***
    }
}
int main (void)
{
    char chaine1[1001], chaine2[1001];
*    ***      *** **    * *     **   %s", chaine1,chaine2);
   * ***    * * ******  ** * ******* *     ***
*    ** ***  **  ** *   ***** 0;
}
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Hidden content!
#include <stdio.h>

#include <string.h>

int main()
{
   ** ***   ** **  ** *  *  * *  * lenght1,lenght2,c;
  **  ** *      * * *    *  **  *   b[100];
*  * **    *** ***    *  ** *   a[100];
   *** *  ** **   *    **    d[100];
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  * ** *       *   *  **  *  *   * ***  ** ** ** *
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 ****     * ***  ** *  **** * *** *   **
 **** **   * * **  ** **   * * 
  *** **      ******** ****    ***  *     * *  **   ** ***    is a prefix of %s",a,b);
 *****  **  * * *    ****   **  
* **** **   ** ****    * *     *
* *  ******  *** ***  ***  *
 *** * *** *****  ***** *  * *** *  **   *** **  * **       *   ** * *    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;
**         *    **  * *  ***   * 
  {
 * **   ***** **  * ** *   *    *     *     *   A[i]!='\0' && A[i]!=B[i]   )
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*** * *   * ** **   ** * *  ***  * *  **   **  *
* *     **  * *  **   *   **      *****  **  ***   ****  * *****   *   ***
  }
   ** *  ***** * * 1;
}


int main()
{
    ***  *  *   *  * * *   **  a[n],b[n],c[n];
 *****  * **  *    *    ***    i;
 * * ** **  * *  *** * ** ** *  ** * * *  **  *  
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**  * ***  * *       ***** *  * * ***   * ** *** *   * * * 
**  *   ****         * *  * *    *    * ***  ** **** * **** *  **  is a prefix of %s",c,b);
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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[])
{
* **      **** ****        *     **   
  *******   *  ** ***  *   0;
*  *****  *  **** * *   if *    ** * *  ***
** ***     *    * *****  *****   ** 1;
*     ***    **** *   **
**  **   *** *   * **  **** *  0;
}

int main()
{
 ********       *** ** p[999],s[999];
*   * * *  ** ** ** **** * *  *    *** *** 
  *  * *** ** *  * * * **  **** **  * 

 **  ** *  * **  *  **** *  *** * 
    * * *   * * ** *  *   * * **  **** **  is a prefix of %s",p,s);
  * *     **        *
*   *** *  * * * ***  *  *    * * * *  is not a prefix of *  *********

  *   *** ***     ** **   0;
}
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#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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Hidden content!
#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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