hoge1.cpp

#include <iostream>
#include <Windows.h>

int main() {
	typedef unsigned char byte_t;

	byte_t* const p = reinterpret_cast<byte_t*>( ::VirtualAlloc( NULL, 1024, MEM_COMMIT, PAGE_EXECUTE_READWRITE ) );
	if ( p == NULL )
		return -1;

	p[0] = 0x55; // push ebp;
	p[1] = 0xB8; // mov eax, 72
	p[2] = 0x72;
	p[3] = 0;
	p[4] = 0;
	p[5] = 0;
	p[6] = 0x5d; // pop ebp;
	p[7] = 0xc3; // ret 0;

	typedef int(*func_t)();

	int const i = (reinterpret_cast<func_t>( p ))();
	std::cout << std::hex << i << std::endl;

	::VirtualFree( p, 0, MEM_RELEASE );
	{ char c; std::cin >> c; }
}