~~禁止阅读 ~~

#include<iostream> using namespace std; int main(){ int i=0; int j=0,k,l=0,flag; char a[101],b[101],c[101],d[202]; cin>>a>>b>>c; while(a[i]!='\0'){ d[i]=a[i]; i=i+1; } while(b[i]!='\0'){ a[i]=b[j]; j=j+1; i=i+1; } while(k=i-j){ if(d[k]!=b[0]){ k++; } else{ flag=1; for(l=1;l<=j;l++){ if(d[k+l]!=b[l]){ flag=0; cout<< break; } } } } return 0; }

#include <bits/stdc++.h> using namespace std; int main(){ string a,b,c; cin>>a>>b>>c; string s1=a+b; if(s1.find(c)!=string::npos) cout<<c<<" is substring of "<<a<<" and "<<b<<endl; else cout<<c<<" is not substring of "<<a<<" and "<<b<<endl; return 0; }

#include<bits/stdc++.h> using namespace std; int main(){ string a, b, c; cin >> a; cin >> b; cin >> c; string d = a + b; if(d.find(c) != -1) cout << c << " is substring of " << a << " and " << b; else cout << c << " is not substring of " << a << " and " << b; return 0; }