Why the following programs will cause error? #include <iostream> using namespace std; template <typename T> T max(T x, T y) { return (x > y)? x : y; } int main() { cout << max(3, 7) << endl; cout << max(3.0, 7.0) << endl; cout << max(3, 7.0) << endl; return 0; }

The program will cause an error in the third `cout` statement because the types of the arguments passed to the `max()` function are different (`int` and `double`). The `max()` function is defined as a templated function that only takes arguments of the same type.

To fix it, you can either make sure that the arguments passed to the `max()` function are of the same type, or modify the `max()` function to take arguments of different types. Here's the corrected code using the latter approach, where the `max()` function takes arguments of different types using template specialization:

#include <iostream>
using namespace std;

template <typename T> 
T max(T x, T y) { 
    return (x > y)? x : y; 
}

template <>
double max(double x, int y) {
    return (x > y)? x : y; 
}

int main() { 
    cout << max(3, 7) << endl; 
    cout << max(3.0, 7.0) << endl; 
    cout << max(3, 7.0) << endl; 
    return 0; 
}

In this corrected code, the `max()` function is specialized for the case where the first argument is a `double` and the second argument is an `int`. This allows the third `cout` statement to work correctly.