qt开发环境

#include <QCoreApplication>#include <iostream>using namespace std;void foo(int i){    cout << i << endl;}void foo(int i,double d){    cout << i << ' ' << d << endl;}int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    foo(1);//编译器换名了    foo(1, 2.);//编译器换名了    return a.exec();}

#include <QCoreApplication>#include <iostream>using namespace std;void foo(int a, int b = 666){    cout << a << ' ' << b << endl;}//某参数有缺省值，后面必须都有//void foo(int a = 233, int b){//    cout << a << ' ' << b << endl;//}//缺省参数可以是常量，常量表达式全局常量int g = 777;void bar(int a = g, int b = 222+1){    cout << a << ' ' << b << endl;}int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    foo(233,233);//222 233    foo(233);//233 666    bar();    return a.exec();}