技術標籤：stl學習之string字串c++stl

string字串的比較

#include<iostream>
using namespace std;
//string字串的比較
void test() 
{
	string s1 = "abc";
	string s2 = "abc";
	int ret=s1.compare(s2);
	if (ret == 0)
	{
		cout << "s1==s2" << endl;
	}
	else if (ret > 0)
	{
		cout <<
 
 "s1>s2" << endl;
	}
	else {
		cout << "s1<s2" << endl;
	}
}
int main()
{
	test();
	system("pause");
	return 0;
}

第二種比較法：

#include<iostream>
using namespace std;
//string字串的比較
void test() 
{
	string s1 = "abc";
	string s2 = "abcd"
 
;
	if (s1==s2)
	{
		cout << "s1==s2" << endl;
	}
	else if (s1>s2)
	{
		cout << "s1>s2" << endl;
	}
	else {
		cout << "s1<s2" << endl;
	}
}
int main()
{
	test();
	system("pause");
	return 0;
}

一般用於判段英文字母是否相等