How to separate float into an integer and a fractional part?

Question

I am willing to cast precise operations and for that purpose I need a way to seperate a float number into an integer and a fractional part. Is there any way for this?

Answer 1

A thought crossed my mind to separate them with some logic :

    #include 

using namespace std;
int main()
    {
    double fr,i,in,num=12.7;
    for(i=0;i

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