C++ Primer 读书笔记 - 第一章

int main()
{
//after ./a.out, execute 'echo $?', it will output 7.
return 7;
}

#include <iostream>
using namespace std;

int main()
{
cout << "/*";
cout << "*/";
cout << /* "*/" */";
}

#include <iostream>
using namespace std;

int main()
{
int a;
int b;
cin >> a >> b;
cout << a << "\t" << b << endl;
return 0;
}

#include <iostream>
using namespace std;

int main()
{
int sum = 0;
int value;
// Ctrl + D to end the input
while (cin >> value)
sum += value;
cout << "Sum is: " << sum << endl;
return 0;
}