Why does double in C print fewer decimal digits than C++?

Question

I have this code in C where I\'ve declared 0.1 as double.

#include  
int main() {
    double a = 0.1;

    printf(\"a is %0.56f\\n\", a);
    retu         


        

Answer 1

It looks to me like both cases print 56 decimal digits, so the question is technically based on a flawed premise.

I also see that both numbers are equal to 0.1 within 52 bits of precision, so both are correct.

That leads to your final quesion, "How come its decimal interpretation stores more?". It doesn't store more decimals. double doesn't store any decimals. It stores bits. The decimals are generated.