#include <string.h>

#ifdef WIN32
 #define PLATFORM_EXPORT __declspec( dllexport )
#else
 #define PLATFORM_EXPORT
#endif

extern "C" int calc( char operation[20], int *operand1, int *operand2, int *result );

extern "C" int calc( char operation[20], int *operand1, int *operand2, int *result ){

	if( !strcmp( operation, "add" )){
		*result = (*operand1) + (*operand2) ;
	}
	else if( !strcmp( operation, "sub" )){
		*result = (*operand1) - (*operand2) ;
	}
	else if( !strcmp( operation, "mul" )){
		*result = (*operand1) * (*operand2) ;
	}
	else if( !strcmp( operation, "div" )){
		*result = (*operand1) / (*operand2) ;
	}
	else{
		*result = 0;
		return -1;
	}

	return 0;
}