10 digit multiplication

[codeblock]

here i want to perform two 10 digit multiplication.I tried but not able to get desired result so any kind of help will be saluted.

[Moschops]

Use a bigNum library.

[codeblock]

But i want to perform it in C.

[vlad from moscow]

It is simple :)

int x = std::numeric_limits<int>::max();
int y = std::numeric_limits<int>::max();
long long z = ( long long )x * y;

std::cout << "x = " << x <<  std::endl; 
std::cout << "y = " << y <<  std::endl; 
std::cout << "z = " << z <<  std::endl; 

The result is

x = 2147483647
y = 2147483647
z = 4611686014132420609

Or you can use unsigned int and unsigned long long if you deal with unsigned numbers.

The other way is to use std::string as number representations and apply std::transfrom algorithm. :)

In C you can use character arrays instead of the class std::string.

[Moschops]

Use a bigNum library written in C.