My program is the tempera trun to the Huashi C:
#include "iostream"
using namespace std;
class tempera
{
public:
float cels;
float change()
{
return (9*cels)/5+32;
}
};
void main()
{
tempera c;
cout << "輸入攝氏溫度值:"<<endl;
cin >>c.cels;
cout << "轉化爲華氏溫度爲:" << c.change() <<"度" <<endl;
.........................................................................................................................
I used the g++ to build this program ,It always says "main must retrun int ".
bd@bd-desktop:~/Documents$ g++ -o tempera tempera.cpp
tempera.cpp:17: error: ‘::main’ must return ‘int’
bd@bd-desktop:~/Documents$
it should be "int main()" instead of "void main(void)" and then put a "return 0" at the end of the function.
這不是程序的問題,而是編譯器的問題
這是 C 語言標準的規定, 而 Dev C++ 嚴格的遵守這個規定.
DOS 版的 Turbo C 3 並不符合語言標準, 它沒錯誤並不表示它是對的.
(注意:main前面的一定要是int,既然main前面加了int那麼main函數裏必須有return語句)