Description: Variable represents a period of operational memory, the memory can also be that the variable is a symbol of that. When a program needs to use memory, you can define a certain type of variable. At this point the compiler the data type of the variable distribution of a certain size of memory space. Program can be accessed through the variable name corresponding to the memory.
If the variable s data type determines the corresponding memory size, then the storage type is affecting the corresponding memory is used. The so-called use, specifically, at what time, where the program can use variables, namely life-cycle and variable scope.
First understand some basic common sense. First, the program runs in three areas of memory can be saved variables: static memory, stack (stack) and heap (heap). Second, the location of the variable definitions can be divided into global variables (variables defined in the function body) and local variables (variables defined in the function body, inclu
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