Show two digits after decimal point in c++ [duplicate]

Similar topic is already discussed in the forum. But I have some different problem in following code:

double total; cin >> total; cout << fixed << setprecision(2) << total; 

If I give input as 100.00 then program prints just 100 but not 100.00

How can I print 100.00?

5 Answers

cout << fixed << setprecision(2) << total; 

setprecision specifies the minimum precision. So

cout << setprecision (2) << 1.2; 

will print 1.2

fixed says that there will be a fixed number of decimal digits after the decimal point

cout << setprecision (2) << fixed << 1.2; 

will print 1.20

It is possible to print a 15 decimal number in C++ using the following:

#include <iomanip> #include <iostream> cout << fixed << setprecision(15) << " The Real_Pi is: " << real_pi << endl; cout << fixed << setprecision(15) << " My Result_Pi is: " << my_pi << endl; cout << fixed << setprecision(15) << " Processing error is: " << Error_of_Computing << endl; cout << fixed << setprecision(15) << " Processing time is: " << End_Time-Start_Time << endl; _getch(); return 0; 

The easiest way to do this, is using cstdio's printf. Actually, i'm surprised that anyone mentioned printf! anyway, you need to include the library, like this...

#include<cstdio> int main() { double total; cin>>total; printf("%.2f\n", total); } 

This will print the value of "total" (that's what %, and then ,total does) with 2 floating points (that's what .2f does). And the \n at the end, is just the end of line, and this works with UVa's judge online compiler options, that is:

g++ -lm -lcrypt -O2 -pipe -DONLINE_JUDGE filename.cpp 

the code you are trying to run will not run with this compiler options...

This will be possible with setiosflags(ios::showpoint).

Using header file stdio.h you can easily do it as usual like c. before using %.2lf(set a specific number after % specifier.) using printf().

It simply printf specific digits after decimal point.

#include <stdio.h> #include <iostream> using namespace std; int main() { double total=100; printf("%.2lf",total);//this prints 100.00 like as C }