how-to-use/cpp/export_c/main.cpp

#include <cstdio>
#include "ex_lib.h"

int main()
{
	math_struct* pMath = create();
	printf("23 + 56 = %d\n", get_sum(pMath, 23, 56));
	free_math(pMath);
	return 0;
}