Trouble using mpir_ui type in my code

Question

I wanted to use this function

int mpz_cmp_ui (mpz t_op1, mpir_ui op2)

For that I have to supply mpir_ui

so whenever I try to declare this ,

 mpir_ui myui; 

it says:

 Error: identifier mpir_ui is undefined 

Am I missing any header file?

All other types and functions work , but only this one is failing.

These are my header file

#include < cstdio>
#include < stdlib.h>
#include < stdio.h>
#include < gmpxx.h>
#include < iostream>
#include <mpirxx.h>
#include <math.h>
#include <windows.h>
#include <mpir.h>
#include<time.h>
#include<string>

Answer 1

You are missing mpir.h. When you use mpz_cmp_ui or mpir_ui, you need to #include mpir.h to get their definitions.