3-4
#include <iostream>
using namespace std;
int main() {
    int c;
    c = 5;
cout<<"Nilai c awal    : "<<c<<endl;
cout<<"Nilai --c    : "<<--c<<endl;
cout<<"Nilai c akhir    : "<<c<<endl;

c=10;
cout<<"Nilai c awal    : "<<c<<endl;
cout<<"Nilai c--    : "<<c--<<endl;
cout<<"Nilai c akhir    : "<<c<<endl;

return 0;
}