题解 | #实现四舍五入#
实现四舍五入
https://www.nowcoder.com/practice/020a0cf673174d5795d97ae79cff59a0
#include <iostream>
using namespace std;
int main() {
double dNum;
cin >> dNum;
if (dNum > 0) {
if ( (bool)(dNum - (int)dNum >= 0.5) ) {
cout << (int)dNum + 1 << endl;
} else {
cout << (int)dNum << endl;
}
} else if (dNum < 0) {
if ( (bool)(dNum - (int)dNum <= -0.5) ) {
cout << (int)dNum - 1 << endl;
} else {
cout << (int)dNum << endl;
}
} else {
cout << dNum;
}
}
// 64 位输出请用 printf("%lld")
