#include<iostream> #include<cstdio> #include<cstring> using namespace std; int main() { char s1[200],s2[200]; gets(s1);//获取字符串s1 gets(s2);//获取字符串s2 if(strstr(s2,s1))//判断s1是否是s2的子串 { cout<<s1<<" is substring of "<<s2<<endl; return 0; } if(strstr(s1,s2))//判断s2是否是s1的子串 { cout<<s2<<" is substring of "<<s1<<endl; return 0; } cout<<"No substring"<<endl; return 0; }