#include<iostream>
#include<time.h>

using namespace std;

time_t ti, tf;
void testChar();
void testStr();

int main()
{
	ti = clock();
	for(int i = 0; i < 100; i++)
	{
		testChar();
	}
	tf = clock();
	cout<<"testChar "<<(tf - ti)<<" "<<(tf - ti)/CLOCKS_PER_SEC<<endl;
	
	ti = clock();
	for(int i = 0; i < 100; i++)
	{
		testStr();
	}
	tf = clock();
	cout<<"testStr "<<(tf - ti)<<" "<<(tf - ti)/CLOCKS_PER_SEC<<endl;
}

void testChar()
{
	char* str_new = (char*) malloc(1000 * 1000 * sizeof(char));
	for(int i = 0; i < 1000; i++)
	{
		for(int j = 0; j < 1000; j++)
			*(str_new + i * 1000 + j) = 'a';
	}
	for(int i = 0; i < 1000; i++)
	{
		for(int j = 0; j < 1000; j++)
			*(str_new + i * 1000 + j) = 'b';
	}
	
	(void) free(str_new);	
}

void testStr()
{
	string str_new = "";
	for(int i = 0; i < 1000; i++)
	{
		for(int j = 0; j < 1000; j++)
			str_new += "a";
	}
	str_new = "";
	for(int i = 0; i < 1000; i++)
	{
		for(int j = 0; j < 1000; j++)
			str_new += "b";
	}
}