• Source 
    1. #include <iostream>
    2. using namespace std;
    3. void decideBuyIphoneVer1(bool cond1, bool cond2, bool cond3) {
    4. 	if (cond1) 
    5. 		if (cond2) 
    6. 			if (cond3)
    7. 				printf("You will buy IPHONE X\n");
    8. 			else
    9. 				printf("You will not buy IPHONE X\n");
    10. 		else
    11. 			printf("You will not buy IPHONE X\n");
    12. 	else
    13. 		printf("You will not buy IPHONE X\n");
    14. }
    15. void decideBuyIphoneVer2(bool cond1, bool cond2, bool cond3) {
    16. 	if (cond1 && cond2 && cond3)
    17. 		printf("You will buy IPHONE X\n");
    18. 	else
    19. 		printf("You will not buy IPHONE X\n");	
    20. }
    21. int main() {
    22. 	bool haveMoney = false;
    23. 	bool wantToBuy = false;
    24. 	bool needToBuy = false;
    25.  
    26. 	//Use version1 or version2 for decision?
    27. 	decideBuyIphoneVer1(haveMoney, wantToBuy, needToBuy);
    28. 	decideBuyIphoneVer2(haveMoney, wantToBuy, needToBuy);
    29.  
    30. 	return 0;
    31. }