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#includeusing 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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staticint nValue; // file scoped variable

floatfValue; // global variable

 

intmain()

{

    doubledValue; // local variable

}