program_6_11.cpp

c++程序设计讲义 cppprograming 含源码

// program 6.11: Default parameters
#include <iostream>
using namespace std;
int foo(int a, int b, int c=1000) {
    return a + b + c;
}
int main() {
    cout << "call by default value:" << endl;
    cout << foo(10, 20) << endl;
    cout << "all parameters are passed:" << endl;
    cout << foo(10, 20, 2000) << endl;
    return 0;
}