Search Sub String

Q. Write a C program to accept two string from user and find sub string from main string.


For example:


main string: This is a good program
sub string: is
result: 2


Ans.


/*c program to find how many times sub string found in main string*/
#include<stdio.h>
#include<conio.h>
#include<string.h>
int main()
{
 int i,j,count=0;
 char str[40],fstr[10];
 printf("Enter main string: ");
 gets(str);
 printf("Enter sub string: ");
 gets(fstr);
 for(i=0; str[i]!='\0'; i++)
 {
  if(str[i]==fstr[0])
  {
   for(j=0; str[i]==fstr[j] && fstr[j]!='\0'; i++,j++);
   if(fstr[j]=='\0')
      count++;
  }
 }
 printf("%d",count);
 getch();
 return 0;
}


/***************Output***************/

Screen shot of find sub-string in main string C program

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