C++ 计算商场优惠价格 - 购物满100元打9折

#include #include using namespace std;

int main(){ int N; cin >> N; int sum = 0; int num; for(int i = 0; i < N; i++){ cin >> num; sum += num; } double result; if(sum > 100){ result = sum * 0.9; } else{ result = sum; } cout << fixed << setprecision(2) << result << endl; return 0; }