Hello GMP is an extension of Hello World. Like Hello World, Hello GMP is a simple console application. Hello GMP, however, also requires the GMP library and to link against it.

Here are some detailed examples of Hello GMP, depending on IDE and operating system:

Download the Qt Creator project 'Hello GMP' (zip)

Technical facts

Application type(s)

Desktop application

Operating system(s) or programming environment(s)

Lubuntu 12.10 (quantal)

IDE(s):

Qt Creator 2.5.2

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.7.2

Libraries used:

STL: GNU ISO C++ Library, version 4.7.2

Qt project file: CppHelloGmp.pro


QT       -= core gui

TARGET = CppHelloGmp

QMAKE_CXXFLAGS += -Wextra -Weffc++ -Werror

unix:LIBS+= -L/usr/lib -lgmp

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

main.cpp


#include <iostream>

#include <gmpxx.h>



///From http://www.richelbilderbeek.nl/CppMpz_tToStr.htm

const std::string Mpz_tToStr(const mpz_t& i)

{

  static char buffer[256];

  mpz_get_str(buffer,10,i);

  return std::string(buffer);

}



int main()

{

  mpz_t i;

  mpz_init_set_str(i,"123456789012345678901234567890",10);

  //Perform i = i * i

  mpz_mul(i,i,i);



  std::cout

    << "Hello GMP,\n"

    << Mpz_tToStr(i) << " times.\n";



  mpz_clear(i);

}

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(C++) Hello GMP

Technical facts

Qt project file: CppHelloGmp.pro

main.cpp