a) Write a C program that displays the position or index in the string S where the string T begins, or – 1 if S doesn’t contain T.

#include<stdio.h> #include<string.h> #include<conio.h> void main() { char s[30], t[20]; char *found; clrscr(); /* Entering the main string */ puts("Enter the first string: "); gets(s); /* Entering the string whose position or index to be displayed */ puts("Enter the string to be searched: "); gets(t); /*Searching string t in string s */ found=strstr(s,t); if(found) printf("Second String is found in the First String at %d position.\n",found-s); else printf("-1"); getch(); } /* Output: Enter the first string: sridhar siricilla Enter the string to be searched: siri Second String is found in the First String at 8 position. */