W3School TIY Editor

#include <iostream> using namespace std; int main() { int myInt = 5; long int myLInt = 5; float myFloat = 9.99; const char* myString = "Hello World!"; cout << sizeof(myInt) << "\n"; cout << sizeof(myLInt) << "\n"; cout << sizeof(myFloat) << "\n"; cout << sizeof(myString) << "\n"; cout << sizeof(char) << "\n"; cout << sizeof(double) << "\n"; return 0; } // 64 位非 Windows 系统输出： // 4 // 8 // 4 // 8 // 1 // 8