#include <stdio.h>
void function1(void);
void function2(void);
int n; // global
int main(int argc, char **argv)
{
n = 0;
printf("main() n = %d\n", n); // 0
function1();
printf("main() n = %d\n", n); // 0 // local variable didn't change global variable
function2();
printf("main() n = %d\n", n); // 12345
n = 77;
printf("main() n = %d\n", n); // 77
n = 999; // this value (999) will NOT change to 100 in function1
// it's a different variable (the global) with the same name
function1();
printf("main() n = %d\n", n); // 999
return(0);
}
void function1(void)
{
int n = 100; // local
printf("finction1() n = %d\n", n); // 100
}
void function2(void)
{
n = 12345; // global
}
/*
run:
main() n = 0
finction1() n = 100
main() n = 0
main() n = 12345
main() n = 77
finction1() n = 100
main() n = 999
*/
