Biegral Blog

#include<iostream>
using namespace std;

int myStrCmp(char str1[], char str2[])
{
	int i;
	for(i = 0; str1[i] && str2[i]; i++)
	{
		if(str1[i] > str2[i])
			return 1;
		if(str1[i] < str2[i])
			return -1;
	}

	if(!str1[i] && !str2[i]) //都已经结束
		return 0;
	if(!str1[i])             //str1结束，而str2还没有结束
		return -1;
	return 1;                //str2结束，而str1还没有结束
}

int main()
{
	cout << myStrCmp("computer", "computer") << endl;
	cout << myStrCmp("compute", "computer") << endl;
	cout << myStrCmp("computer", "compute") << endl;
	cout << myStrCmp("hello", "world") << endl;
	cout << myStrCmp("miss", "her") << endl; 
	return 0;
}

结果为：

0
-1
1
-1
1