static关键字

his is my code what i writted for the Comprehensive quiz. After i was done with it and tested that it works ( and it worked as it needed ) i checked out the solution but sawed that i do did it in an other way. I want you if you have some time that to check down the code and what do you think about it.
Im totally new in this C++ programming, started with your tutorial just a few days ago but i learned java in scool so probably its recogniseable in my codeing :D .

#include
#include

using namespace std;

int main()
{
double nNumberOne = 0;
double nNumberTwo = 0;
char nSymbol;
double nEredmeny = 0;

cout <> nNumberOne ;
cout <> nNumberTwo ;
cout <> nSymbol;
if (nSymbol == ‘+’ ){
nEredmeny = nNumberOne + nNumberTwo;

cout << nNumberOne <<" + " << nNumberTwo << " = " << nEredmeny;
}

if (nSymbol == '-' ){
nEredmeny = nNumberOne – nNumberTwo;

cout << nNumberOne <<" – " << nNumberTwo << " = " << nEredmeny;
}

if (nSymbol == '*' ){
nEredmeny = nNumberOne * nNumberTwo;

cout << nNumberOne <<" * " << nNumberTwo << " = " << nEredmeny;
}

if (nSymbol == '/'){
nEredmeny = nNumberOne / nNumberTwo;

cout << nNumberOne <<" / " << nNumberTwo << " = " << nEredmeny;

在前人的经验教训，你了解了局部变量（有块范围）和全局变量（有计划的范围）。还有另一个作用域的变量，可以水平：文件范围。

文件范围内的变量可以被访问的任何功能或嵌在一个单一的文件。申报文件作用域的变量，简单地声明一个变量，一块外（同一个全局变量）但使用static关键字：

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static int nValue; // file scoped variable float fValue; // global variable   int main() {     double dValue; // local variable }