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Discussion :: Floating Point Issues

  1. What will be the output of the program?

     #include
 int main()
 {    
    float a=0.7;  
    if(a 0.7f)         
       printf("C\n");   
     else      
      printf("C++\n");    
    return 0; 
 }

    2. A.

    C
    B.

    C++
    C.

    Compiler error
    D.

    Non of above

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    Answer : Option B

    Explanation :

    if(a here a is a float variable and 0.7f is a float constant. The float variable a is not less than 0.7f float constant. But both are equal. Hence the if condition is failed and it goes to else it prints 'C++'
    Example:

    #include int main() {     float a=0.7;     printf("%.10f %.10f\n",0.7f, a);     return 0; }

    Output:
    0.6999999881 0.6999999881

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