Dependent types

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
template<typename T,int size> class contain {private:	T arr[size];
template<typename T,size_t size> class contain {private:	T arr[size];
public: 
T operator [](size_t i) const{
if(!(i<size)){puts("Requested Index out of range. Aborting");exit(2);}
return arr[i];};
T& operator[](size_t i) {
if(!(i<size)){puts("Input Index out of range. Aborting");exit(1);}
return arr[i];};};

int main(){
contain<int,50> A;
int i;
int rts=scanf("%d", &i);
 A[i] = 100;
 printf("%d", A[i]); return rts;}