C++ 控制小数位#include iostream#include iomanip#include cmathusing namespace stdint main(){d
C++ 控制小数位
#include <iostream>#include <iomanip>#include <cmath>using namespace std;int main(){double r;while(cin>>r) { r = r>=0?r:-r; cout << setiosflags(ios::fixed) << setprecision(2) << r << endl;}return 0;}