Core-Compiler-Lab/Task1.cpp at main · MD-LEON-MIA/Core-Compiler-Lab · GitHub

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#include <iostream>
using namespace std;

bool check1(char *s){

   while(*s!='\0'){
    if(*s!='a'){
        return false;
    }
    s++;
   }
   return true;
}

bool check2(char *s){

  if(*s=='a' || *s=='b'){
    return true;
  }
  else{
    return false;
  }
}

bool check3(char *s){
    while(*s!='\0'){
        if(*s!='a' && *s!='b'){
            return false;
        }
        s++;
    }
    return true;
}
bool check4(char *s){
    if(*s!='a'){
        return false;
    }
    if(*(s+1)=='\0'){
        return false;
    }
    while(*s!='\0'){

        s++;
    }
    if(*s=='b'){
        return true;
    }
    return false;
}


    int main() {
        string input;
        cout << "Enter a string: ";
        cin >> input;

        char *str = &input[0];

        cout << "check1: ";
        if(check1(str)){
            cout << "Accepted\n";
        }
        else{
            cout << "Rejected\n";
        }

        cout << "check2: ";
        if(check2(str))
        {
         cout << "Accepted\n";
        }
        else{
            cout << "Rejected\n";
        }


        cout << "check3: ";
        if(check3(str)){
            cout << "Accepted\n";
        }
        else{
             cout << "Rejected\n";
        }
        cout << "check4: ";
        if(check4(str))
        {
            cout << "Accepted\n";
        }
        else
        {
            cout << "Rejected\n";
        }

        return 0;
    }