Script broke.

[FireCoder]

Any one help me fix this?

//The following calculates the average of three numbers.

#include <iostream>
#include <cstdio>
#include <cstdlib>

float val1, val2, val3, valSum;

int calculate ()
{
    valSum = val1 * val2 * val3 / 3;
}

int main ()
{
    std::cout << "Please enter your tree numbers: ";
    cin >> val1 >> val2 >> val3;
    
    switch (calculate);
    
    cout << "The average is: " << valSum;
    
    return 0;
}

[Computergeek01]

Your switch statement doesn't do anything, and that is NOT how you calculate an average.

[Ganado]

Read about how to properly make and call a function here http://www.cplusplus.com/doc/tutorial/functions/
Also your use of global variables breaks any encapsulation that the function would otherwise provide, which by the way should be returning an int based on your calculate function's signature.

[48T7M4Gy]

#include <iostream>

//The following calculates the average of three numbers.
float calculate (float v1, float v2, float v3)
{
    float average = ( v1 + v2 + v3 ) / 3;
    return average;
}

int main ()
{
    float val1, val2, val3, avg;
    
    std::cout << "Please enter your three numbers: ";
    std::cin >> val1 >> val2 >> val3;
    
    avg = calculate( val1, val2, val3 );
    
    std::cout << "The average is: " << avg;
    
    return 0;
}