effect of static variable ? how is it working ?

Question

#include <stdio.h>
#include <stdlib.h>

int a,b,c =0;
void prtFun(void);
int main()
{
        static int a=1;
        prtFun();
        a+=1;
        prtFun();
        printf("\n%d %d ",a,b);
}
void prtFun(void)
{
        static int a=2;
        int b=1;
        a+=++b;
        printf("\n%d %d ",a,b);
}

What is the output ? Expalin how ?

Comments

Output :

4 2

6 2

2 0

Explanation : If a variable is declare inside a function. Then its scope is limited to that function.

Static variable are defined only once. Even the same function is called again and again. And they will be present permanently till program ends.

---

Static variable working with a different example

Answer 1

to understand better use same code without static variable and cheak the result