Learn about local static variables in C language, their definition, usage, and examples to understand how they differ from regular local variables.
A static local variable exists only inside a function where it is declared (similar to a local variable) but its lifetime starts when the function is called and ends only when the program ends. The main difference between local variable and static variable is that, the value of static variab...
int fun(void){ static int count = 10; // local static return count--; } int count = 1; // global int main(void) { printf("global\t\tlocal static\n"); for(; count <= 10; ++count)printf("%d\t\t%d\n", count, fun()); return 0; } 程序的运行结果是: global local static ...
$ cat localstatic.c extern int foo(); int globvar = foo(); int bar() { static int localvar = foo(); return localvar; } $ gcc localstatic.c -c localstatic.c:2: error: initializer element is not constant localstatic.c: In function ‘bar’: localstatic.c:5: error: initializer ...
thus avoiding causing errors in other source files. From the above analysis, we can see that the change of the local variable to a static variable is changed by its storage mode, which changes its lifetime. Changing a global variable to a static ...
(1) a static local variable defines its lifetime in the function as the entire source, but its scope remains the same as that of the automatic variable, and can only be used within the function defining the variable. After exiting the function, you cannot use it even though it still ...
当我们同时编译多个文件时,所有未加static前缀的全局变量和函数都具有全局可见性。为理解这句话,我举例来说明。我们要同时编译两个源文件,一个是a.c,另一个是main.c。 下面是a.c的内容 char a = 'A'; // global variable void msg() { printf("Hello\n"); ...
Using thestatickeyword on a local variable changes its duration from automatic duration to static duration. This means the variable is now created at the start of the program, and destroyed at the end of the program (just like a global variable). As a result, the static variable will retain...
每一个内部含至少1个non-local static对象(位于①global对象、②定义于namespace作用域内的对象、③在...
static int localvar = foo(); return localvar; } [tsecer@Harry localstatic]$ gcc localstatic.c -c localstatic.c:2: error: initializer element is not constant localstatic.c: In function ‘bar’: localstatic.c:5: error: initializer element is not constant ...