This question already has answers here:
Show two digits after decimal point in c++ [duplicate]
(5 answers)
Printing the correct number of decimal points with cout
(13 answers)
Closed 3 years ago.
I'm trying to Run a program that converts Currency From KD to DOLLAR and EURO.
The problem is I'm expecting the output to be with 3 floating numbers but the actual out put is just 1 floating number after the decimal point like the pi.
std::fixed should solve your issue :
double a = 3.149;
std::cout << std::setprecision(6) << std::fixed << a << "\n";
will output :
3.149000
Related
This question already has answers here:
Printing the correct number of decimal points with cout
(13 answers)
Closed 11 months ago.
I need to write a simple program, which would round off double number to just 2 decimal places. Example:
input - 0.3333333, 124.132001
output - 0.33, 124.13
Use std::set_precision as in
std::cout << std::fixed << std::setprecision(2) << 0.3333333;
This question already has answers here:
Round double to 3 points decimal [duplicate]
(4 answers)
Closed 3 years ago.
double i = 2.5373737373737....
Is there anyway to get rid of decimals after 2 digits decimals so it can be 2.57? (without displaying it by using setprecision)
setprecision(int) function in iomanip can help to print with required precision.
#include <iostream>
#include <iomanip>
using namespace std;
int main () {
double i =2.537373737;
std::cout << setprecision(3) << i << '\n';
}
This question already has answers here:
Set the digits after decimal point
(7 answers)
Closed 9 years ago.
C++
I would like to cout float f = 2.3333, but only with two decimals. How do I do that?
I remember something like this, but it doesn't work:
cout << f:2 << endl;
Using stream manipulators fixed and setprecision:
#include <iomanip>
float f = 2.3333;
std::cout << std::setprecision(2) << std::fixed << f;
I managed to solve it without iomanip:
cout << (((int)f*100) % 100)/100;
This question already has answers here:
Round double to 3 points decimal [duplicate]
(4 answers)
Closed 4 years ago.
I've used the following to round my values to 2 decimal points:
x = floor(num*100+0.5)/100;
and this seems to work fine; except for values like "16.60", which is "16.6".
I want to output this value like "16.60".
The way I'm outputting values is the following:
cout setw(12) << round(payment);
I've tried the following:
cout setw(12) << setprecision(2) << round(payment);
But that gave me answers like
1.2e+02
How can I output the values correctly?
This is because std::setprecision doesn't set the digits after the decimal point but the significant digits if you don't change the floating point format to use a fixed number of digits after the decimal point. To change the format, you have to put std::fixed into your output stream:
double a = 16.6;
std::cout << std::fixed << std::setprecision(2) << a << std::endl;
you can use printf / sprintf or other similar functions. Following code will format floating point value into two digits after decimals. Refer to the printf manual for more formatting info
float f = 1.234567
printf("%.2f\n", f);
From Trevor Boyd Smith's comment:
If you are allergic to printf and friends there is the type safe C++ version in #include <boost/format.hpp> which you can use to do:
float f = 1.234567;
cout << boost::format("%.2f") % f << endl;
This question already has answers here:
How do I print a double value with full precision using cout?
(17 answers)
Closed 6 years ago.
I want to output the value of a double in it's full precision. However, when using the cout function, it only displays the first 6 digits even though there is around 15-16 digits of precision.
How do I get my program to display the entire value, including the magnitude (power) component?
Use the setprecision() manipulator:
http://www.cplusplus.com/reference/iostream/manipulators/setprecision/
You can also force scientific notation with the scientific manipulator:
http://www.cplusplus.com/reference/iostream/manipulators/scientific/
cout << scientific << setprecision(15) << my_number << endl;
you could use something like this :
#include <iomanip>
cout << setprecision (9) << double_value << endl;
more iomanipulators, here
You're looking for setprecision (code taken from link):
int main () {
double f =3.14159;
cout << setprecision(15) << f << endl;
return 0;
}