I'm very new to C++. I'm teaching myself from online tutorials with minimal previous programming experience. I have a question about void. I read that declaring a function void means that that function does not return a value. How can a function not return any value and still contribute to the program? Do I not correctly understand the way the definition uses the term "return"? Thanks.
a void function can still perform actions, and there is a way using what are called "references" to get it to pass back modified variable values even though it has no return value as a function.
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#include <iostream.h>void add(int, int, int&);
int main()
{
int x, y, z;
x=2;
y=3;
add(x, y, z);
cout << z << endl;
}
void add(int x, int y, int& z)
{
z = x + y;
}
this lets main() get a return value for the variable z using a reference (the & symbol), in this case the number 5.
Understanding void