atof() precision issue

This is a discussion on atof() precision issue within the C++ Programming forums, part of the General Programming Boards category; string line2 = "-89.75131467880756"; cout<<line2<<" <> "; xcord = atof(line2.c_str()); cout<<xcord<<endl; output - -89.75131467880756 <> -89.7513 Question is ... how ...

  1. #1
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    atof() precision issue

    string line2 = "-89.75131467880756";
    cout<<line2<<" <> ";
    xcord = atof(line2.c_str());
    cout<<xcord<<endl;


    output -
    -89.75131467880756 <> -89.7513


    Question is ... how do i get it to desplay more precision.

  2. #2
    The Richness... Richie T's Avatar
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    This should do it:

    Code:
    #include <iostream>
    #include <iomanip>
    #include <string>
    
    using namespace std;
    
    int main (void)
    {
    	double xcord;
    	string line2 = "-89.75131467880756";
    	cout<<line2<<" <> ";
    	xcord = atof(line2.c_str());
    	cout<<setprecision(16) << xcord<<endl;
    	return 0;
    }
    No No's:
    fflush (stdin); gets (); void main ();


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  3. #3
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    Such a simple fix..... Thank you sooooo much =)

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