関連ワード:  how do you define a variable in c++    how do you declare a variable in c++    how do you declare a constant variable in c++    how do you declare a string variable in c++    how do you declare a pointer variable in c++    how do you declare a reference variable in c++    how do you declare and initialize a variable in c++    how do you declare a variable of type float in c++    how do you declare an integer variable in c++    how to set a variable in c++