C-Program to Check whether both Strings are Anagrams or not

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<ctype.h>

int main()

{

 int i,j,flag;

 char s1[100],s2[100];

 printf("Enter String to check whether both are Anagrams or not\n");

 gets(s1);

 printf("Enter String 2\n");

 gets(s2);

 for(i=0;i<strlen(s1);i++)

 {

  flag=0;

  for(j=0;j<strlen(s2);j++)

  {

   if(tolower(s1[i])==tolower(s2[j]))

   {

    flag=1;

    break;

   }

  }

  if(flag!=1)

  {

   printf("Both %s and %s are Not Anagrams\n",s1,s2);

     exit(0);

  } 

 }

 printf("Both %s and %s are Anagrams\n",s1,s2);

 return 0;

}