C++ :: Reverse Polish Calculator - How To Make Program Exit If User Enters Only 0
Oct 11, 2013
I have my Reverse Polish calculator compiling and everything but for the assignment I need to handle a few exceptions that I can't seem to get. First off I'm trying to make the program exit if the user enters only "0" but since the input i'm using is string, I cant figure out how to code
"If the first node is 0 and the next node = NULL, return true"
Here is my code:
#include<iomanip>
#include<iostream>
#include<stdlib.h>
#include<stdio.h>
#include<string>
#include<sstream>
using namespace std;
class Stack {
[Code] .....
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Sep 24, 2014
been working on this code til my eyes bled, can not get second operand to work, if i enter 1 2 3 + - it will only return 5 from the addition operand.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
[Code].....
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Sep 21, 2014
I have this code in order to make a RPN calculator,but im trying to read from the console entering the expression in reverse polish notation,Also I think it will be better to use fgets() instead of scanf since the person can entere something like this 3 2 1 + x
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
[Code].....
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Aug 18, 2014
I am writing a program for a class where the user enters their age, how much money they have, and their full name. I know that I have to use the getline method to get the user's full name, and I know that I have to use cin.ignore() before that code, but i'm not sure why I have to use cin.ignore()?
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Nov 21, 2014
This is the problem :- Write a program that keeps reading integers until user enters -1, then it prints the maximum and the minimum among all numbers (-1 should be ignored).
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Feb 20, 2013
I need to create a command where the user inputs a character and it'll exit out the program rather than executing any of the other code.
For example :
If I wanted to do like
char key;
if (key == D || key == d)
{
}
What would I need to put in between those brackets under the if statement to allow the user to enter the letter D and it would close out the program?
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Sep 9, 2014
// clang++ -g -std=c++11 main.cpp -pthread
#include <iostream>
#include <thread>
#include <unistd.h>
void thread1(void) {
while(1)
[code]....
Thread 1 does some background work, and thread2 is waiting for the user's input. If I join thread1 then the app can never exit. If I neither join nor detach thread1 then I get "terminate called without an active exception Aborted" which is not a good thing to have. If I do detach on thread1 does thread1 ever terminate? If not, how to terminate it? Also, how do I check if it's terminated or not?
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Sep 8, 2014
Code:
// clang++ -g -std=c++11 main.cpp -pthread
#include <iostream>
#include <thread>
#include <unistd.h>
void thread1(void) {
while(1) {
int i = 88 * 2;
[Code]...
Thread1 does some background work, and thread2 is waiting for the user's input.
If I join thread1 then the app can never exit. If I neither join nor detach thread1 then I get "terminate called without an active exception Aborted" which is not a good thing to have.
If I do detach on thread1 does thread1 ever terminate?
If not, how to terminate it?
Also, how do I check if it's terminated or not? -- I realize it's platform specific, I am on Linux.
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May 25, 2014
I had been tasked to create a program that reverses a word i.e.
cat
tac
How to make my program non case-sensitive using vectors?
Code:
// BackWardsSentence.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
string BackWords (string sentence);
int BackSentence (string sentence);
string BackWords1 (string sentence);
[Code] .....
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Aug 4, 2013
My goal is to create a loop that keeps taking user input over and over until the user doesn't enter anything into 'cin >>', leaves the line blank, and simply presses the ENTER key to move on, at which point the program is supposed to break out of the loop and continue on with the rest of program execution. Something like this:
Code:
do {
cout << "
Enter a name: ";
cin >> input1;
if (input1.empty())
[Code] ....
As you can see, I've already tried using the empty() function, but that didn't work, the program simply stays in the loop and doesn't break out, no matter how many times I press enter. It just keeps prompting me to enter a name. I've also tried using something like
Code: if (input1 == "")
but that doesnt work either. How do I break out of this loop?
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Aug 4, 2013
So I've run into the following problem. My goal is to create a loop that keeps taking user input over and over until the user doesn't enter anything into 'cin >>', leaves the line blank, and simply presses the ENTER key to move on, at which point the program is supposed to break out of the loop and continue on with the rest of program execution. Something like this:
do {
cout << "
Enter a name: ";
cin >> input1;
if (input1.empty()) {
[Code] .....
As you can see, I've already tried using the empty() function, but that didn't work, the program simply stays in the loop and doesn't break out, no matter how many times I press enter. It just keeps prompting me to enter a name. I've also tried using something like
if (input1 == "")
but that doesn't work either. How do I break out of this loop?
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May 19, 2013
How to write a simple script to convert F to C. That was easy enough once I read about how C treats the math of 5/9 being less then 1 thus converts to 0. Fixed that issue and the code works great.
I find it a useful tool and would like to, way outside of the scope of the homework mind you, figure out a way to get the script to restart if a [Yy] answer is provided at the end of the script. All other responses result in return(0).
I only have limited knowledge in BASH scripting. In BASH i would have just placed the int main(void) {foo} into a single function then created a simple if/then test after the function is called.
Reading up on functions in C, they do not work in the same way I would like to treat them from BASH. understandable this is not BASH.
then i started looking into do/while loops. On an other forum someone pointed out the possibility of using fgets as part of the challenge response. Now when I try to compile the code im getting an odd result. for some reason the compiler seems to think that my character string(or is it an array) is an integer...
Code:
/* 5. Write a program to convert a temperature in degrees Fahrenheit to degrees Celsius. *///##########################################################
// Created by Raymond L. Brunkow
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 or version 3 of the
// license, at your option.
//
[Code] ....
//above is were the homework ends, below is what im trying to do now.
/* Prompt for new input */
printf("
Would you like to enter a new temperature [Y]es or [N]o? ");
fgets( BUFFER, sizeof(BUFFER), stdin );
}
while ( sscanf( BUFFER, "%1s%*1s", ANS ) != 1 || strchr( "YyNn", *ANS ) == NULL );
return(0);
}
This results in the following error:
Code:
$ gcc -o hw_1_5.v2 hw_1_5.v2.c
hw_1_5.v2.c: In function "main":
hw_1_5.v2.c:52:
warning: passing argument 1 of "fgets" makes pointer from integer without a cast There is no integer there to be passed.
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Jul 25, 2014
My program gets user input and compares it against an array of characters (guessLetters[x]) to decide whether the do/while loop repeats. The whole character array contains underscores yet if i enter any letter it goes into the if statement and repeats the do/while loop.
do {
repeatflag = false;
cin >> UserInput;
UserInput = toupper(UserInput);
[Code] .....
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Oct 15, 2013
So I'm trying to make a program that asks the user for a number and then prints a statement the same number of times the user entered. 3 different statements, using the 3 loops (for, while, and do while). I made the program but for some reason the statement from the do while loop goes off infinitely.
MY CODE:
The error:
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Jul 4, 2013
I have two questions about C programming here :
1. I want to make a file in the program directory that can't be deleted by user out of the program make that file.for example if I make a file named "123.xyz" by the program named "text.exe" and then exit test.exe ,if I tried to delete the file 123.xyz I faced the error and I could not do it but by the test.exe program that make that file.
2. I heard about a function called "Parbegin()".any way i want to know is there any possible way to run two or more functions of a file.c together,like the parbegin function did an do in OS?
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Sep 22, 2013
I need to write a program to make the user input some text, and the first letter of each word has to be uppercase. (have to use while loops)
So for example lets say the user inputs:
i lOvE pRoGrAmMiNg
The output needs to be:
I Love Programming
Code: int main()
{
char c, lower_c;
printf("Enter Text");
while (c != '' && c >= 0)
{
if (c >= 'A' && c <= 'Z')
lower_c = c + 32;
else
lower_c = c;
[Code]...
I have started this code by making the letters lowercase (I don't know if this was the right way to approach this, ). I am not sure how proceed after this step, the step of making the first letter uppercase. (PS for the program, loops should be while loops)
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Nov 21, 2014
why it doesn't enable to register except one time
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Jan 25, 2013
If a user enters a string of boolean algebra it will ouput the table.
I have input parsing, cycling through the combinations, and outputing working. However once i parse the input I am not sure what to do with it. I have thought of having it write the parsed input to a new file as a function and then use that function, but that seems bad.
How to dynamically create the function, how to implement it.
BTW This is a console function, if that changes anything.
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Feb 10, 2014
ive been learning from the book for 4 days and decided to make a different type of calculator out of boredom but im really having problems when i try to make it a loop? ive been scratching my head trying to work it out rewriting deleting etc but cant work it out
Code: #include <iostream>
#include <string>
using namespace std;
int main()
[Code].....
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Jul 21, 2010
I'm making a calculator project but i can't find a solution for backspace button ,, i used these code -->
TxtNumber.Text.Remove(0,1);
But it removed the first number i wrote in the TxtNumber(TextBox) not the last one !!!!
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Oct 27, 2013
Enter as many numbers as you want as long as the user doesn't type 'e' to exit.
Problem: When I enter a number, it works fine, but if I enter e then it'll go in an infinite loop since the letter is being stored in an int variable. How can I (when I press 'e') make it convert to a char to make it end the program?
#include <iostream>
using namespace std;
int main() {
int num;
cout << "Enter a number or press e to exit:";
[Code] ....
Our class has just started c++ and we have not learned arrays and classes yet, so I'm guessing there is a way to do this without it? Or no?
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Dec 8, 2013
Game doesn't exit after the user chooses to quit. Loop for the game isn't working. Board does not reset when user wishes to try another game.
#include <iostream>
#include <cstdlib>
#include <conio.h>
using namespace std;
char square[10] = {'o','1','2','3','4','5','6','7','8','9'};
int checkwin();
void board();
[Code] .....
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Jul 4, 2013
I want to autogenerate employee id when user enters details of employee
Conditions:
User Selects Department which should be used as prefix.
A new Sequence of numbers must be generated for each department
Example:
DeptA0001
DeptA0002
Again DeptB new seuquence must be started
DeptB0001
DeptB0002...
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May 26, 2013
How can I make the output print out to the screen in reverse?
Code: #include <iostream>
#include <iomanip>
using namespace std;
int getnum();
void Fibonacci(int n);
[Code].....
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Feb 4, 2015
I've been reading my code for the past 3 days and I cannot get 0 to exit the program.
#include <iostream>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <fstream>
using namespace std;
size_t dub_count = 0;
size_t op_count = 0;
[Code] .....
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Jan 19, 2014
I have am having a bit of trouble with a baisc calculator that I am writing for my intro to programming class at Uni. We are using the C programming language. The program is supposed to be able to add, subtract, multiply, and divide. It is also supposed to return certain messages if an error has occurred. This is how the program is supposed to perform:
bash-4.2$ ./calc
enter expression: 4.25 * 3.3
result: 14.025
[Code]....
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