为什么#include "iostream" #include "string" #include "algorithm"都不加.h而加上就会出错呢？

Question

#include "iostream"
#include "string"
#include "algorithm"
using namespace std;
bool IsSubstring (string s,string t)
{
    char *it;
    int i;
    int x=s.length();
    it=t.begin();
    for(i=0;i<x;i++)
    {
        it=(find(it,t.end(),s[i]));
        if(it==t.end())
            return false;
    }
    return true;
}
int main()
{
    string s,t;
    while(cin>>s>>t)
    {
        if(IsSubstring(s,t))
            cout<<"yes"<<endl;
        else
            cout<<"no"<<endl;
    }
    return 0;
}

Answer 1

简单来说iostream是c++头文件，iostream.h是c头文件。有些编译器不支持iostream.h，你的编译器属于这种

https://blog.csdn.net/LYKXHTP/article/details/88359043