https://www.chd4.com down code example
Example: crazyhd
#include <stdio.h>
int main() {
int var1 = 5, var2 = 5;
// var1 is displayed
// Then, var1 is increased to 6.
printf("%d\n", var1++);
// var2 is increased to 6
// Then, it is displayed.
printf("%d\n", ++var2);
return 0;
}