K and R C, Solution to Exercise 4-1:
K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language (2nd Edition). You can learn and solve K&R C Programs Exercise.
Write a C program which returns the position of the occurrence of sub string t in string s, or -1 if there is none.

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#include<stdio.h>
#include<conio.h>
void main()
{
 int flag=0;
 char str[80],search[10];
 puts("Enter a string:");
 gets(str);

 puts("Enter search substring:");
 gets(search);
 flag=strindex(str, search);
 if (flag == -1)
 {
  printf("SEARCH UNSUCCESSFUL! AND POSITION IS:%d",flag);
 }
 else{
  printf("SEARCH SUCCESSFUL! AND POSITION IS:%d",flag); 
 }
 getch();
}

//strindex: returns the right most index of t in s, -1 if none*/
int strindex(char s[], char t[])
{
 int k,i,j,pos;
 pos = -1;
 for(i=0;s[i] != '