Finds substrings C++

#include <iostream>

using std::cin,std::cout,std::endl,std::string;
// -std=c++17

bool is_upper(string *word,int el)
{
    for(int c=0;c<word[el].size();c++){
        if(std::isupper(static_cast<unsigned char>(word[el][c]))){                  return true;
        }

    }
    return false;
}

void start_mess(){
cout
<<"This program seeks for a substring within"
<<" another string. First enter the sub-string"
<<" then the string to be searched."
<<endl
<<endl
<<"BUT FIRST:"
<<endl
<<"Enter amount of test cases to be done"<<endl;
}
void sub_string_mess(){
    cout<<"enter possable substring"<<endl;
    }
void search_string_mess(){
    cout<<"enter string to be searched"<<endl;
    }

void upper_case_err_mess(){
    cout<<endl<<"ALL TEXT HAS TO BE <lowercase>!"
    <<endl
    <<"and or under 1001 chars."
    <<endl
    <<"You figure out what you did wrong. I'm just a computer."
    <<endl<<endl;
    }

int main(){
/* MAX TEST 100 */
string strA[100]={"SCOOBIE"},strB[100]={"DOO"};
string sub,search;
int test_case=0,tested=1;
char testing='y';
    int ct2=0;
   int ct1=0;

// get amount of test control loop
while(testing == 'y'){

start_mess();
cin>>test_case;

   if(!cin){
        std::cin.clear();
        std::cin.ignore(std::numeric_limits<
        std::streamsize>::max(), '\n');
        std::cerr<<endl<<"Bad input"<<endl<<endl;
        continue;
    }
    else if(test_case<=0 || test_case>100){
    cout<<"does not meet the requirments\n"
    <<"limits 1-100 tests"<<endl;
    continue;
    } // end i
    else{

        testing='n';
   } // end else

} // end testing loop

// get strings control loop
char gs='y';
while(gs=='y'){

   char sbs='y';
   while(sbs=='y'){

    //sub_string_mess();

    /*skips over these functions */
    //getline(cin,strA);
    //cin.getline(strA,1000);
    cin>>strA[ct1];
        if(is_upper(strA,ct1) ||
        strA[ct1].size()>1000 ||
        strA[ct1].size()<1) {
            upper_case_err_mess();
            continue;
        }
        else{
         sbs='n';
         }
    }// end sub string for


    char ss='y';
    while(ss=='y'){

        //search_string_mess();

            /* skips over these functions */
            //cin.getline(strB,1000);
            //getline(cin,strB);
        cin>>strB[ct2];
            if(is_upper(strB,ct2)   ||
                strB[ct2].size()<1  ||
                strB[ct2].size()>1000){
                upper_case_err_mess();
                continue;
            } // end if
            else
                ss='n';
   } // end for

    // stop loop check
    if((tested++)>=test_case){
        gs='n';
   }
    else{ // reset srting gathering
        sbs='y';
        ss='y';
        ct1++;
        ct2++;
   } // end else
} // end control loop

cout<<endl<<endl<<endl;

for(int a=0;a<test_case;a++){
/*
cout<<endl<<strA[a]<<endl
<<strB[a]<<endl;
*/
    strB[a].find(strA[a]) != string::npos ?
    cout<<"YES"<<endl:cout<<"NO"<<endl;

}
cout<<"one more time using a different methiod"<<endl<<endl;

for(int d=0;d<test_case;d++){
strB[d].find(strA[d].c_str(), strA[d].size()) != string::npos ?
        cout
        <<endl
        << " Yep "
        <<endl :
        cout << " nope "
        << endl;
}



return 0;
}