Question

我是初学C++语言，按照书上的代码编写出现“Error:未定义的标识符'cout' ".请高手指教一下，应该怎么改？

#include "stdafx.h"#include <iostream>
void PrintArray(char warename[][10],int len,int sum[][12])
{
for (int i=0;i<3;i++)
{

cout << "商品名称：" << warename[i] <<endl;
int s = 0;
for (int j=0;j<12;j++)
s += sum[i][j];
cout << "12个月总销量：" << s << endl;
}
}

int main()
{
//商品名称
char warename[3][10] = {{"电视机"},{"冰箱"},{"空调"}};
//商品12个月的销量
int sellsum[3][12] = {{35,46,24,50,46,23,54,30,40,31,26,49},
{46,58,47,95,68,75,46,35,42,41,36,32},
{65,98,46,53,85,74,68,24,35,63,55,64}};
//输出商品及12个月的销量
PrintArray(warename,3,sellsum);
return 0;
}

这是源代码

Answer 1

//#include "stdafx.h"
#include <iostream>
using namespace std;
void PrintArray(char warename[][10],int len,int sum[][12])
{
for (int i=0;i<3;i++)
{

cout << "商品名称：" << warename[i] <<endl;
int s = 0;
for (int j=0;j<12;j++)
s += sum[i][j];
cout << "12个月总销量：" << s << endl;
}
}

int main()
{
//商品名称
char warename[3][10] = {{"电视机"},{"冰箱"},{"空调"}};
//商品12个月的销量
int sellsum[3][12] = {{35,46,24,50,46,23,54,30,40,31,26,49},
{46,58,47,95,68,75,46,35,42,41,36,32},
{65,98,46,53,85,74,68,24,35,63,55,64}};
//输出商品及12个月的销量
PrintArray(warename,3,sellsum);
return 0;
}

Answer 2

using namespace std;

Answer 3

也可以在把#include <iostream>改为#include <iostream.h>

Answer 4

#include "stdafx.h"
#include <iostream>
using namespace std; //加上这句

Answer 5

"#include <iostream>
在这加上using namespace std;