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Any Program Sample???
	Forum : IDE C++ Sous Catégorie : Aucune Type du sujet : Sujet Normale FAQ : FAQ IDE C++
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mysterio
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Inscrit : 28/08/2005
Messages : 10

#77029 Posté le 07/10/05 à 20:04

Write a program that read a line of text, changes each uppercase letter to lowercase and places each letter both in a queue and onto a stack.
The program should then verify whether the line of text is a palindrome

Output:

Please enter a line of text
I am A.I

i AM a.i

This is a palindrome

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eVias
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Inscrit : 25/01/2004
Messages : 1008

#77107 Posté le 08/10/05 à 23:55

You just have to declare a function which will convert the upper to lower and lower to upper ... At the begin of the function you check if the letter is uppercase or lowercase and you convert it ... :)

To read a line you have to use the cin method. And to output text cout ..

Why didn't i give you the code ?

Because we are not like a 'code factory' :P: We just help if someone has a problem ... ^^

Peace Smiley

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mysterio
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Inscrit : 28/08/2005
Messages : 10

#77327 Posté le 12/10/05 à 08:22

this what i have done...
still hv some problems...

1.my output:-
Please enter a line of text:
i am not a.i
i am not a.i
This is a palindrome <-----it must be this is not a palindrome(uncorrect answers)
Press any key to continue

2. how to use the touppercase() n tolowercase()combine as below???

I am A.I

i AM a.i

#include<iostream> #include <cstdlib> // For EXIT_FAILURE and EXIT_SUCCESS #include <fstream> #include<string> #include <algorithm> #include <iomanip> #include <cctype> using namespace std; const int MAX=50; // initialize max string size of 50 characters typedef char StackElement; // define StackElement typedef char QueueElement; // define QueueElement class Stack { public: Stack(){top=-1;arr[MAX]=0;} // default stack constructor void push(StackElement & ch); // push function StackElement topNpop(); // top and pop functions combined bool empty() const; // empty function private: StackElement arr[MAX]; // define char array int top; // define int top }; /******************************************* FUNCTION: push() DESCRIPTION: Pushes an element onto the stack PRECONDITION: Waiting for function call POSTCONTION: New element character on top of stack *******************************************/ inline void Stack::push(StackElement & ch) { if(top<MAX) { top++; // increment top arr[top]=ch; // push onto stack } else { cout<<"Stack is full.\n"; // display stack is full } } /******************************************* FUNCTION: topNpop() DESCRIPTION: Reads and pops top element off the stack PRECONDIION: Waiting for function call POSTCONDITION: One element read and removed fromt he stack RETURN: Top element from stack ********************************************/ inline StackElement Stack::topNpop() { if(top>-1) { return(arr[top]); // returns top element top--; // remove froms stack } else { cout<<"Stack is empty.\n"; // display stack is empty return(0); } } /******************************************* FUNCTION: empty() DESCRIPTION: returns result value if stack is empty PRECONDITION: result=false POSTCONDITION: result may be true or remain false RETURN: result if true or false ********************************************/ inline bool Stack::empty() const { bool result=false; // initialize bool as false if (top==-1) { result=true; // if top is -1 return result true return(result); } else { return(result); // else return false } } class Queue // Queue class { public: Queue(){front=0, back=0;arr[MAX]=0;} // Queue default constructor void addq(QueueElement & ch); // define addq QueueElement frontNremoveq(); // define frontNremove private: QueueElement arr[MAX]; // initialize QueueElement array int front, back; // initialize int front and back }; /******************************************* FUNCTION: addq() DESCRIPTION: adds an element onto the queue PRECONDITION: Waiting for element to add POSTCONDITION: New element now on the queue ********************************************/ inline void Queue::addq(QueueElement &ch) { if(front!=(back+1)%MAX) { arr[back]=ch; // add element to back of queue back=(back+1)%MAX; } else { cerr<<"Error Queue is full\n"; // display queue is full } } /******************************************* FUNCTION: frontNremoveq() DESCRIPTION: reads and removes front element from queue PRECONDITION: front pointing to front of queue POSTCONDITION: front element is returned and then incremented ********************************************/ inline QueueElement Queue::frontNremoveq() { if(front!=back) { return(arr[front]); // return front element front++; // remove front element } else { cout<<"Queue is empty.\n"; // display queue is empty return(0); } } /***************************MAIN******************************/ int main() { Stack S; // initialize stack Queue Q; // initialize queue string s ; int i=0; // initialze int 'i' char string[MAX]; // initialize char string bool RESULT=false; // initilize bool RESULT to false strcpy(string," "); //transform(s.begin(),s.end(),s.begin(),toupper); cout << "Please enter a line of text: " << endl; cin.getline (string,100); while(string[i]!=NULL) { S.push(string[i]); // push chars individually from string to Q.addq(string[i]); // stack and queue i++; // next char } while(i>0) { if(S.topNpop()==Q.frontNremoveq()) // compare each element from { // stack and queue RESULT=true; // if same for all chars return true } else { RESULT=false; // if not same for any char break and return false break; } i--; } if(RESULT==true) { cout<<string<<" \nThis is a palindrome\n"; // display if true } else { cout<<string<<" \nThis is not a palindrome\n"; // display if false } cout<<s<<s<<endl; return 0; }

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