how to round off a double value to 2 decimal places c++ code example
Example 1: round double to n decimal places c++
float roundoff(float value, unsigned char prec)
{
float pow_10 = pow(10.0f, (float)prec);
return round(value * pow_10) / pow_10;
}
auto rounded = roundoff(100.123456, 3);
Example 2: round double to n decimal places c++
value = round( value * 100.0 ) / 100.0;
value = round( value * 1000.0 ) / 1000.0;
Example 3: get number round off to two decimal places c++
float a,b,c,d,sum;
cin>>a>>b>>c>>d;
sum=(a*b*c*d);
sum=round(sum*100)/100;
if((float)sum < (float) 9.58)
cout<<"YES\n";
else
cout<<"NO\n";
Example 4: round double to 2 decimal places c++
double d = 0.12345;
std::cout.precision(2);
std::cout << d << std::endl;