C++比较运算符

#include "iostream"
#include "iomanip"
#include "cstring"
using namespace std;

int main()
{
    system("chcp 65001");

    // c语言风格字符串，直接运用比较运算符，比较的是内存地址，而不是内容
    char s1[] = "hello";
    const char *s2 = "hello";
    cout << "s1 == s2: " << (s1 == s2) << endl;

    // strcmp进行比较，0代表相等，-1代表s1<s2，1代表s1>s2
    cout << "s1 == s2 ? " << strcmp(s1, s2) << endl;

    char s3[] = "a";
    const char *s4 = "b";
    cout << "s3 == s4 ? " << strcmp(s3, s4) << endl;
    cout << "c是否大于a? " << strcmp("c", "a") << endl;

    // 在比较中只要有1个c++风格字符串，就可以用比较运算符了
    string s5 = "d";    // c++风格
    char s6[] = "d";    // c语言风格
    cout << "s5 == s6 ? " << (s5 == s6) << endl;

    return 0;
}