c++printfcout

C++ equivalent of printf() or formatted output

I am relatively new to the C++ world. I know std::cout is used for console output in C++. But consider the following code in C :

#include<stdio.h>

int main(){
    double dNum=99.6678;
    printf("%.02lf",dNum);
    //output: 99.67
 return 0;
}

How do I achieve the similar formatting of a double type value upto 2 decimal places using cout in C++ ?

I know C++ is backward compatible with C. But is there a printf() equivalent in C++ if so, then where is it defined ?

Solution

  • This is what you want:

    std::cout << std::fixed << std::setprecision(2);
std::cout << dNum;

    and don't forget to :

    #include <iostream>
#include <iomanip>