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Discussion :: Floating Point Issues

  1. What will be the output of the program?

     #include
 int main()
 {   
     float f=43.20;   
     printf("%e, ", f);       
     printf("%f, ", f);     
     printf("%g", f);  
     return 0; 
 }

    2. A.

    4.320000e+01, 43.200001, 43.2
    B.

    4.3, 43.22, 43.21
    C.

    4.3e, 43.20f, 43.00
    D.

    Error

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    Workspace

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    Answer : Option A

    Explanation :

    printf("%e, ", f); Here '%e' specifies the "Scientific Notation" format. So, it prints the 43.20 as 4.320000e+01.

    printf("%f, ", f); Here '%f' specifies the "Decimal Floating Point" format. So, it prints the 43.20 as 43.200001.

    printf("%g, ", f); Here '%g' "Use the shorter of %e or %f". So, it prints the 43.20 as 43.2.

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