Shaddy-Ethical-hacking: A C - PROGRAM FOR MATCH ANY CHARACTER BETWEEN TWO ENTERED STRINGS (WORDS)

MATCH STRING

THIS IS A PROGRAM TO MATCH ANY CHARACTER OF TWO ENTERED STRING (WORDS) AND DISPLAY THE POSITION (FIRST POSITION) OF THE CHARACTER MATCHED FROM THE 1ST ENTERED STRING.

THE PROGRAM IS :

#include<stdio.h>
#include<stdio.h>
int matchany(char [],char []);
void main()
{
    int pos;
    char s1[20],s2[20];
    printf("Enter the first string \n");
    gets(s1);
    printf("Enter the second string \n");
    gets(s2);
        pos=matchany(s1,s2);
        printf("\n The first string is %s \n",s1);
        printf("\n The second string is %s \n",s2);
        if(pos==-1)
        {
            printf("\n no character of %s is present in %s \n",s1,s2);
        }
        else
        {
            printf("\n the match letter in %s is at position = %d \n",s1,pos);
        }
        getch();
}
        int matchany(char s1[],char s2[])
        {
            int i,j;
            for(i=0;s1[i]!='\0';i++)
            {
                for(j=0;s2[j]!='\0';j++)
                {
                    if(s1[i]==s2[j])
                    {
                        return (i+1);
                    }
                }
            }
            return -1;
        }