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 !!!!
how work backspace key in c++.i want to make a program which can work as a backspace number
View 1 Replies View RelatedI want to incorporate a button into my current program that opens up a calculator in a different window. I have the code for the calculator and the program. I have never worked with buttons or windows.
View 4 Replies View Relatedive 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].....
I am new to qt. I want to make it so a button is only clickable if they check a radio box. otherwise it wont do anything. how would i write that?
View 3 Replies View RelatedHow can I make a button transparent? I know i can select color Transparent, but that takes the background color, and i want to be transparent all because i have a video behind it. What can i do? :o3
I have a video and there is some buttons which should be pressed. I could insert the buttons but they are semi-transparent...
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] .....
[URL]
#include <iostream>
#include <string>
#include <conio.h>
[Code].....
the code use in above link is good but one problem i cant able to use backspace to remove mistake if user made any mistake he cant able to remove the mistaken character
In the following char array, notice the use of a backspace character in a string literal: ''.
char text1[50] = "aHello,
World! Mistakee was "Extra 'e'"!
";
What exactly does a backspace character do here? When the compiler evaluates this line, does it actually delete the previous character, like when you press the backspace button on the keyboard?
How to avoid using Backspace character with push_back? I'm making a software as an ATM, so when the user try to enter the password the user only sees *******, but when trying to delete it doesn't delete a character. It just adds a new one. Here's my code:
string password2 = "";
cout << "PASSWORD: ";
ch = _getch();
while(ch != 13) //character 13 is enter {
password2.push_back(ch);
cout << '*';
ch = _getch();
}
And also, I try to use pop_back(); but it doesn't work either.
I have an code that makes form window + button bet bigger when pressed each time, but it runs endless till out of screen,
code:
{
int S1 = 300;
int S2 = 0;
[Code]...
make it so it runs only each time i press the button?
I just started by defining a stack class (stackDouble). I need to write a program that accepts an infix calculator expression, with the following operators (**, exponentiation, /, division, and, -, subtraction. The operator precedence is exponent, division, and subtraction.I need to use a stack of doubles and a stack of strings, of which I can write two classes, or write a single stack template. The user will input the expression just via cin, and there will be a # before every number, a ! before each operator, and a . at the end of the expression. '#', '!', or '.' can be input into a char variable, numbers into a double variable and operators into a string variable.
For example, the following would output 6:
# 3 ! / # 2 ! / # .5 ! ** # 2 .
As stated above, I already made up a stackDouble class. What would I need to do to create the other class (I don't think I want to do it with a template)?
Code:
#include <iostream>
#include <string>
using namespace std;
class stackDouble{
[code]....
getting error with gcc under OSX.
Code:
/* bmi2.c */
#include <stdio.h>
main()
{
float height, weight;
printf("Enter weight:
");
[code]....
I have an assignment to do a calculator in C, wich will work by clicking the numbers with the mouse, however i have a bug that when i hold the mouse and dragg it, it assumes that I'm clicking multiple times, also, when I click in an empty space the program creates a blank space on the calculator screen.
Code:
#include <stdio.h>
#include <conio.h>
#include <math.h>
#include "..MouseHandler.h" // ajustar o caminho ao seu projecto
#include "..calcSkinLib.h" // ajustar o caminho ao seu projecto
#define PI = 3.1415;
[code]....
I've been wondering this, since there is so many things which needs to be taken care of. I created one, but it wasn't precise.
View 19 Replies View RelatedI'm trying to create a program that will calculate the gpa of several different students, whose data are in a text file. The file looks something like this, with possibly more lines.
Mark 3 4 A 3 D 2 C 1 A
Tom 2 3 A 2 C
The very first number tells us how many credit hour/grades will follow. I have a couple of problems though: From the code I've written I don't seem to get any data other than the first line. Also the gpa that does print out after the file runs is just a 0.00, rather than the actual gpa.
#include<stdio.h>
int main(void)
{
[Code].....
'm trying to program a BMI calculator in C for my assignment where the weight must be in KG and an int , and the height must be in m and a double value. The program should allow the user to input his weight(kg) and height(m) separated by a space and be able to calculate and display the BMI. My code is shown below :
#include<stdio.h>
int
main(void) {
int weight;
double height,bmi;
bmi = weight / ( height * height ) ;
scanf("%d%lf" , &weight , &height );
printf("BMI = %f", bmi);
return 0;
}
However , after running the program , I constantly get a 1.#INF00 value for my result.The compiler did not show any errors so why I'm getting this value.I input my weight and height in this format "45 1.65" 45 being the weight and 1.65 being the height.
I basically just have to make a calculator that only uses getchar/putchar (printf is Ok for displaying errors) - Also, negatives must be error-checked. As of right now, my program will only work if there is exactly one space between the number, operand, and other number. No spaces, or more than one space, will give me some very weird digits. I also need to display the numbers with putchar, and not printf (as I did below), but I just really wanted a working program.
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <math.h>
int add(int input1,char operand, int input2);
int subtract(int input1,char operand, int input2);
[Code] .....
I was asked to build a small program to calculate the are of a Triangle but my code must have some problem.. />
#include "stdafx.h"
void main()
{
int a,b;
[Code]....
I get this errors:
-warning C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS.
-warning C4244: '=' : conversion from 'int' to 'float', possible loss of data
I am making a calculator where I will input 5 array of numbers and calculate those numbers with pointers or whatever you call it. I am getting an error like
note C:Dev-Cppincludec++3.4.2itsostream.tcc:63 candidates are: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>&(*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char, _Traits = std::char_traits<char>]
and more error if I try to fix the code. So yeah, can i have a hand?
Btw, here's my code.
#include <iostream.h>
#include <conio.h>
#include <stdio.h>
using namespace std;
// function declaration:
void getAverage(int*);
void getSum(int*);
[Code] .....
I have to enhance my BMI program to tell whether the person is at optimal weight, under weight, or overweight and I cannot find the correct calculation. Here is the code I have so far that works for calculating the BMI.
namespace Body_Mass_Index {
public partial class BMI_HW : Form {
public BMI_HW() {
InitializeComponent();
[Code] ....
In my calculator, I am trying to make it so that you put enter 1 to add, 2 to subtract, 3 to multiply, and 4 to divide. I am facing the issue of making it so that you must enter a number, however instead of it being any number, it must be 1, 2, 3, or 4, and if it is not any of those numbers, you must re-enter the number. Here is a little snippet of my code:
Code:
printf("Please enter 1 to add, 2 to subtract, 3 to multiply, or 4 to multiply: ");
while (scanf("%d", &input) != 1) {
while (getchar() != '
');
printf("Invalid option. Please try again: ");
[Code] ....
how I can make the loop affect specific numbers.
The main point of the program is to calculate equations just like a standard calculator but I wanted to do it myself. I don't understand what the problem is right now but I've managed to create a program that asks for both values but somehow it doesn't want to ask for an operator (*, /, + etc). What's wrong with my code that the terminal skips the scanning part for the operator?
Code:
#include <stdio.h>
int main() {
int value1, value2, answer;
char operator;
[code]....
I am supposed to get 2 numbers then have the person choose what they want to do to the numbers. Here is the code:
//Mike Karbowiak
//12/24/13
//Mathematics
#include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <algorithm>
[Code] ....
The errors I am getting so far are:
error C2660: 'Add' : function does not take 0 arguments
error C2660: 'Subtract' : function does not take 0 arguments
error C2660: 'Multiply' : function does not take 0 arguments
error C2660: 'Divide' : function does not take 0 arguments
I'm building a pretty basic calculator program that calculates the area of generic shapes (triangles, rectangles, and squares); for some reason though, my program is having troubles as soon as it hits the if/else code in the int main section. When I enter triangle, rectangle, or square, it just spits back out the "That's not one of the options. Please re-enter and try again." error line I created. When I isolate and run just the stuff inside the if/else statements it works great, but why it won't just understand my if (shape == triangle).... .
Code:
#include <iostream>
using namespace std;
class figure {
protected:
double x, y;
[Code] ....
I'm working on below program and I want the program to do the same thing, but with not one main() function, but instead one main() function PLUS one user defined function called computeConeVolume that contains the calculation. In other words I want to remove the one line calculation and replace it with a function call, then write and add the function below main with the calculation, surrounded any other syntax that I need to complete it.
The function should contain local variables and a constant declared and must have the calculation, it may not do anything else such as input or output. Should be able to declare "global" variables anywhere but no variables above or outside of main() and the function are allowed. A value-returning function should be used because it's a little simpler to understand, but you can employ a void function. Need to have a function prototype at the top of the code, then main, then your function.
//Cone Volume Calculator Program
#include <iostream>
using namespace std;
int main( ) {
//Declare variables and constants
double coneRadius = 0.0;
double coneHeight = 0.0;
[Code] ....