GNU Multiple Precision Arithmetic Library - Example

Example

Here is an example of C code showing the use of the GMP library to multiply and print large numbers:

#include #include #include int main(void) { mpz_t x; mpz_t y; mpz_t result; mpz_init(x); mpz_init(y); mpz_init(result); mpz_set_str(x, "7612058254738945", 10); mpz_set_str(y, "9263591128439081", 10); mpz_mul(result, x, y); gmp_printf("\n %Zd\n*\n %Zd\n--------------------\n%Zd\n\n", x, y, result); /* free used memory */ mpz_clear(x); mpz_clear(y); mpz_clear(result); return EXIT_SUCCESS; }

This code calculates the value of 7612058254738945 × 9263591128439081.

Compiling and running this program gives this result. (The -lgmp flag is used if compiling on Unix-type systems.)

7612058254738945 * 9263591128439081 -------------------- 70514995317761165008628990709545

Read more about this topic:  GNU Multiple Precision Arithmetic Library

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