Show Two Digits After Decimal Point in C++

C language how to format a double to 2 digits after the decimal point?

The complete list

Integer   display
%d print as decimal integer
%6d print as decimal integer, at least 6 characters wide
%f print as floating point
%6f print as floating point, at least 6 characters wide
%.2f print as floating point, 2 characters after decimal point

With the required modification (scanf("%.2f",&x); in the last entry) will solve your problem

Leave only two decimal places after the dot

string.Format is your friend.

String.Format("{0:0.00}", 123.4567);      // "123.46"

How do I display a decimal value to 2 decimal places?

decimalVar.ToString("#.##"); // returns ".5" when decimalVar == 0.5m

or

decimalVar.ToString("0.##"); // returns "0.5"  when decimalVar == 0.5m

or

decimalVar.ToString("0.00"); // returns "0.50"  when decimalVar == 0.5m

Printing the correct number of decimal points with cout

With <iomanip>, you can use std::fixed and std::setprecision

Here is an example

#include <iostream>
#include <iomanip>

int main()
{
double d = 122.345;

std::cout << std::fixed;
std::cout << std::setprecision(2);
std::cout << d;
}

And you will get output

122.34

Round floating point:Print exactly two digits after the decimal point rounded to the nearest decimal place

C or C++ don't care about what you need.

12.555 is not a binary floating point number. Binary floating point numbers are all integers multiplied by or divided by a power of two. 12.555 is not such a number. So when you write 12.555 then what you get is the floating-point number nearest to 12.555. Which may be smaller or larger than 12.555 and will be correctly rounded to 12.55 or correctly rounded to 12.56.

Calculate x * 1000 and round (x * 1000), which will give 12555. If x * 1000 is very close to round (x * 1000) and the last digit of round (x * 1000) is odd then increase it by 1. Divide by 10, round again, divide by 100.

Round double in two decimal places in C#?

This works:

inputValue = Math.Round(inputValue, 2);


Related Topics



Leave a reply



Submit