real_number.cc

由matlab开发的hybrid系统的描述语言

#include "Real_number.h"
#include <stdio.h>
#include <float.h>
#include <math.h>

string Real_number::to_matlab() const {
	char buf[100];
	char format[15];

	sprintf(format, "%%.%ug", DBL_DIG);
	sprintf(buf, format, value);

	/* Smarter alternative, but does not work on win32
	printf("%1$.*2$g ",f,DBL_DIG);
	Works on all the compiler but may introduce tuncation errors
	printf("%f ",f);*/

	return string(buf);
}


void Real_number::sin() {
	value =::sin(value);
}

void Real_number::cos() {
	value =::cos(value);
}

void Real_number::sqrt() {
	assert(value >= 0); //temporary
	value =::sqrt(value);
}

void Real_number::exp() {
	value =::exp(value);
}

void Real_number::log() {
	assert(value > 0); //temporary
	value =::log(value);
}

void Real_number::neg() {
	value = -value;
}

void Real_number::plus(Real_number * n) {
	value += n->value;
	delete n;
}

void Real_number::minus(Real_number * n) {
	value -= n->value;
	delete n;
}

void Real_number::mult(Real_number * n) {
	value *= n->value;
	delete n;
}

void Real_number::div(Real_number * n) {
	assert(n->value != 0); //temporary
	value /= n->value;
	delete n;
}

void Real_number::min(Real_number * n) {
	if (n->value < value) value = n->value;
	delete n;
}

void Real_number::max(Real_number * n) {
	if (n->value > value) value = n->value;
	delete n;
}