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...
The scope of the variable defines where, in the program, the variable will be accessible. The scope can be either local or global. So, let’s learn about local and global variables in Python. 1. Local Variables in Python A variable that is declared inside a Python function or module can...
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 ...
global local static 1 10 2 9 3 8 4 7 5 6 6 5 7 4 8 3 9 2 10 1 3. static的第三个作用是默认初始化为0.其实全局变量也具备这一属性,因为全局变量也存储在静态数据区 在静态数据区,内存中所有的字节默认值都是0x00,某些时候这一特点可以减少程序员的工作量。比如初始化一个稀疏矩阵,我们可以一...
The lifetime of static variables doesn’t depend on the execution: they always exist; forever; no matter what. This leads to the beautiful property that they can be potentially evaluated and initialized at compile time. The Two Stages of Static Variable InitializationPermalink ...
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 ...
$ 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 ...
Using the static keyword 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 re...