gXa's blog

Comparison with double
By gXa, history, 9 years ago, In English

If N and M are used as double, then for comparing them, can we do this:

if( N<=M ) { cout << "Yes"; }

If not then suggest what to do?

If N is long long and M is double, then for comparing them, can we do this:

if( N<=M ) { cout << "Yes"; }

If not then suggest what to do?

Comparison with double is causing me problem. So guide me what to do?

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9 years ago, # |
← Rev. 2   Vote: I like it -19 Vote: I do not like it 
if(n - m <= EPS){
    cout << "Greater";
}
else{
    cout << "Less";
}
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    9 years ago, # ^ |
      Vote: I like it -13 Vote: I do not like it

    This is for n==m not n<=m. I am assuming EPS as epsilon.

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9 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it 
if (n-m<=eps) { cout<<"yes"; }

where eps=1e-6 or a smallest value;

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9 years ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

Okay I also want to confirm that value of epsilon should be taken as 10^(-9). I have found most of times that 10^(-6) or numeric::limits epsilon() gives WA.

Guide me on this?

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