C ++编译器错误c4430“c ++不支持默认int” [英] C++ compiler error c4430 "c++ doesnt support default int"

问题描述

您好我试图定义一个名为USHORT的别名。

Hi im trying to define an alias called USHORT.

    // *****************
// Demonstrates typedef keyword
#include <iostream>

typedef unsigned short int USHORT;  // typedef defined

main()
{
USHORT  Width = 5;
USHORT Length;
Length = 10;
USHORT Area  = Width * Length;
std::cout << "Width:" << Width << "\n";
std::cout << "Length: "  << Length << std::endl;
std::cout << "Area: " << Area;
}

我不断收到编译错误：

错误1错误C4430：缺少类型说明符 - 假定为int。注意：C ++不支持default-int c：\ usersrs \ nanqvi-home \documents\justit\c ++ \w1 \cp1 \ list0304.cpp 8 1 ConsoleApplication3

Error 1 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int c:\users\naqvi-home\documents\justit\c++\w1\cp1\list0304.cpp 8 1 ConsoleApplication3

谢谢

Ray

推荐答案

它与您的 typedef 无关。问题是你还没有给出 main 的退货类型：

It has nothing to do with your typedef. The problem is that you haven't given a return type for main:

int main()
{
  // ...
}

函数必须具有返回类型。 main 函数必须返回 int 。

A function must have a return type. The main function must return int.

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