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Discussion :: C Preprocessor

  1. Point out the error in the program

     #include
 #define SI(p, n, r) float si; si=p*n*r/100;
 int main()
 {    
    float p=2500, r=3.5;  
    int n=3;     
    SI(p, n, r);   
    SI(1500, 2, 2.5);     
    return 0;
 }

     

    2. A.

    26250.00 7500.00
    B.

    Nothing will print
    C.

    Error: Multiple declaration of si
    D.

    Garbage values

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    Workspace

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    Answer : Option C

    Explanation :

    The macro #define SI(p, n, r) float si; si=p*n*r/100; contains the error. To remove this error, we have to modify this macro to

    #define SI(p,n,r) p*n*r/100

     

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