CODEWITHSUNDEEP
c++integer
user3764893
user3764893

Reputation: 707

How to represent large number in c++

I am trying to represent some large numbers in c++. In the below code if tried only to print s the compiler would not complain. But If try to make some multiplications and storing it in t the compiler would say integer overflow in expression...

I tried to make it unsigned long long t but again the compiler complains. Is there any way in doing this multiplication without having any overflow? 

int main ()
{
    long long int s = 320718425168;
    long long int t = 4684688*68461; //4684688*68461 = 320718425168

    return 0;
}

Upvotes: 2

Views: 746

Answers (1)

Columbo
Columbo

Reputation: 60969

The literals used as the factors of the products are of type int, which cannot represent the product.

Cast one of the factors to long long first.

long long t = (long long)4684688 * 68461;

Or use the corresponding literal suffix ll or LL to change the literals type. I.e.

long long t = 4684688LL * 68461;

Demo.

Upvotes: 7

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