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Est? Ment variables are a part? Til C. They give you the flexibility to make functions that return data m? S complex but can be dif? Difficult to understand and use effectively.

Declaring a variable

know that static variables are always declared within a function? N C, but unlike other variables, their values still exist and have been maintained, even after? s of the function? n the exits .

Declaring a variable using the same syntax as if it were to declare a local variable normal, but before the declaration? with the word n est? policy, like this:

Static int sum = 0;

of inicializaci? N s expected to happen? The first time what I call the function? N. Subsequent times, follow the previous value? N ah?. If you omit the inicializaci? No, that be? automatically initialized to 0 .

use of the variable in the function? n as har? to any other .

Remember that, like any other local variable, a variable can not be referred to outside the function? n. However, if you pass a pointer to? L, the pointer can be dereferenced? Success, as the variable .

still there? Namely cu? Ndo use variables

Use a variable to allow its function? n which has its own memory that carries m? s of the two calls. For example, a function? N which receives and analyzes the next l? Line of a file might need to keep the inside of the track that found in the file .

Use a variable as a how to provide a piece of memory to store a result. For example, a function? N concatenate strings to be able to? To use a variable in which to store the result of the concatenaci? Ny return a pointer to it. The variable of the available memory is constant, but is released automatically when the program ends, like any other local variable .

use of static variables running out of the acumulaci? Not like. Consider this example:

int running_total (int num) (static int sum = 0; num = sum; return sum ;}

Every time you call this function? N, and that keeps a running total returns n all? just went with it.

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