Sample C Program To Accept A String & Display It's Substring.

#include<stdio.h>
#include<conio.h>
#include<string.h>

char substr(char *p, int s, int n);

void main()
{

char str[50];
int start,no_of_chars;
clrscr();

printf(" \n \n Enter the string: \t ");
gets(str);

printf(" \n \n Enter start position for substring: \t ");
fflush(stdin);

scanf(" %d ",&start);
printf(" \n \n Enter number of characters: \t ");
fflush(stdin);

scanf(" %d ",&no_of_chars);
substr(str,start,no_of_chars);
getch();

}

char substr(char *p, int s, int n)
{

int i;
printf(" \n \n The substring is: \t ");
for( i = s - 1; i < n;i++)
 {
  printf("%c",p[i]);
 }
return 1;
}


OUTPUT: 

Enter the string: Please Mention Your Address:
Enter start position for substring: 20
Enter number of characters: 7
The substring is: Address


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