one();
label:
two();

if(three()) {
	goto label;
}
four();

=>

int x=0;
do {
	x=0;
	switch(x) {
	case 1:
		one();
	case 2:
		two();
	case 3:
		if(three()) {
			x = 2;
			break; //breaks the *switch*
		}
	case 4:
		four();
	}
} while(x != 0);