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")