#include <iostream.h>


int Add(int first, int second)
{
    std::cout << "In Add(),recieved " << first << "and " << second << "\n";
    return (first+second);
}

int main()
{
    using std::cout;
    using std::cin;
   
    count << "I'm in main()!\n";
    int a, b, c;
    cout << "Enter two numbers: ";
    cin >> a;
    cin >> b;
    cout << "\nCalling Add();\n";
    c=Add(a,b);
    cout << "\nBack in main().\n";
    cout << "c was set to " << c;
    cout << "\nExiting...\n\n";
    getchar();
    return 0;
}

为什么在VC 6.0老是说    error C2653: 'std' : is not a class or namespace name
我照着例题输的。。。
用Dev-C++又可以

#include <iostream.h>

using namespace std;

int Add(int first, int second)
{
    std::cout << "In Add(),recieved " << first << "and " << second << "\n";
    return (first+second);
}

int main()
{
    using std::cout;
    using std::cin;
   
    cout << "I'm in main()!\n";
    int a, b, c;
    cout << "Enter two numbers: ";
    cin >> a;
    cin >> b;
    cout << "\nCalling Add();\n";
    c=Add(a,b);
    cout << "\nBack in main().\n";
    cout << "c was set to " << c;
    cout << "\nExiting...\n\n";
    getchar();
    return 0;
}

error C2871: 'std' : does not exist or is not a namespace
error C2653: 'std' : is not a class or namespace name

[ 本帖最后由 Sheldon 于 2010-6-26 14:44 编辑 ]

#include<iostream>对了，没报错
为什么不能加.h呢？
头文件不都是.h的么？