/* an example of an extern storage class variable */

/* 'File A' has an external variable */

#include<stdio.h>

void func1(void);
void func2(void);

int a; // defined a global variable

int main()
{
	func1();
	a = a + 5;
	printf("In main a = %d\n", a);
	func2();
	a = a + 25;
	printf("In main a = %d\n", a);

	return 0;
}

void func1(void)
{
	a = 15;
	printf("In func1 a = %d\n", a);

	return;
}