C :: Expression Extraction In Program Runtime From User
Apr 6, 2013I want to extract expressions like <23.34 463.2 23.2 + *> in program runtime from the user. (I am trying to evaluate postfix expression)....
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C# :: User Writing A Method During Runtime
Mar 23, 2014I'm doing a project. And I want to give the user the ability to write methods just like you would regularly in c# during runtime and then use them during runtime. Is such thing even possible? If so how?!
View 12 Replies View RelatedC/C++ :: Creating Constant At Runtime With User Entered Value?
Aug 14, 2014At the moment I am making program that will use a 2d selection of "cells" to make a "map" of sorts. However, the size will not be known until run time.
I figured using an array would good, because once the size is chosen it won't be changed. However I can't create an array without using a constant.
So the first question is, can I create a constant at run-time with a user entered value that can then be used for an array size? If so, how?
Otherwise, what are my options to achieve this? I know vectors can be used, but A, my compiler keeps giving me problems even when C&P some code bits (yes I even remembered to #include and such) and B, I noticed that vectors reserve extra memory for when the size changes but this is bad (well my dinky little program won't notice, but trying to set good habits as I learn, so I'm keeping it in mind) as I don't need and don't want to allow the size to change after creation.
Which leads to number three, if I do have to use vectors, how can I prevent any accidental size changes after the initial size is determined?
C++ :: Extraction Between Two Barriers
May 24, 2014I've written this code to extract everything that is between "/*" and "*/". Unfortunately it doesn't work.
#include <iostream>
#include <string>
using namespace std;
int main () {
int x = 0;
[Code] ....
C++ :: File Stream And String Extraction?
Apr 7, 2014I am currently trying to read in a file that takes in the input in the following form.
Code:
HANK>25 BOB>31 AL>54
BILL>41 ABE>63 JEFF>50
I have tried the following solution:
Code:
#include<ifstream>
#include<iostream>
using namespace std;
struct node
{
string name;
int age;
);
int main ()
{
[code]....
The problem is a.name, it's extracting the entire string before the space character causing p.age to contain "BOB" and so on. I've tried using p.get(p.name, sizeof(p.name), '-') with '-' as the delimiter and p.getline() using a character array instead of a string. How would it be possible to only copy the string into a.name before the '>' character?
C++ :: Overloading Stream Extraction Operator?
Oct 1, 2013I wrote a class that can display fractions ex. 1/4 and I cannot figure out how to get >> to process 1/4 and separate them into variables numerator and denominator.
my program just constantly creates RationalNumber Objects when it reaches cin >> A .
my overloaded stream extraction function:
istream& operator >> (istream& in, const RationalNumber& rn)
{
char L;
[Code].....
C++ :: Program Ignores If / Else Statements On Runtime
Dec 4, 2013Need fixing code to calculate male and female body fat percentages. Should a switch structure be used? Here is what I got:
#include <iostream>
#include <cmath>
#include <iomanip>
#include <string>
using namespace std;
int main() {
int bodyWeight;
double bodyFatPercent,bodyFat;
[Code] .....
C++ :: Insertion Sort Program - Runtime Error
Apr 11, 2013I am trying to run this program for Insertion Sort, But some how I am getting some problem:
#include<iostream>
int main(){
int i,j,key,n;
scanf("%d",&n);
int a[n];
[Code] .....
Error
In function 'int main()':
Line 10: error: ISO C++ forbids variable-size array 'a'
compilation terminated due to -Wfatal-errors.
C++ :: Program Needs To Compile Various Source Files At Runtime
Oct 30, 2014My program needs to compile various source files at runtime.What is the most elegant way to compile cross platform with g++ from within my program? Is there a gcc-library I can use? I know that I could use popen() to open a Unix pipe and call g++ as command line tool. But first it isn't really cross platform and second it doesn't seem elegant to me.
View 10 Replies View RelatedC++ :: Simple Encryption Program Runtime Error
Jul 22, 2014I am trying to make a simple program for encrypting a char* with the XOR operator. The code compiles and links perfectly, but I get an Access violation runtime error:
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <string>
#include <fstream>
using namespace std;
int main(int argc, char** argv) {
[Code] .....
Text that I am inputting:
My username is memberfunction.
C++ :: Constructors / Classes For Expression Tree Program
May 7, 2012Previously I made a infix postfix calculator with integers only using structures, which had only three files
1.main.cpp,
2.arithmetic_expression.cpp
3.arithmetic expression.h,
I manged eventually to bring it together. now there are 5 files which are using classes, constructors and destructors and there can be letters in the expression that can have assigned values. Newnode, struct node and all that fine and dandy stuff made sense, this doesn't. What needs to be done in those empty functions in arethmetic_expression.cpp? It was going well until I reached createxpressiontree{ in th arithemetic_expression.cpp and those constructors in there. At that point I missed my structures and was totally confused by the constructors. I know constructors are supposed to create objects, but then I dont know what i am creating the object for and what that object is supposed to do.
1.main.cpp
2.arithmetic_expression.cpp
3.tree.cpp
4.arithmetic_expression.h
5.tree.h
Main.cpp
Code:
#include <iostream>
#include <string>
#include <vector>
#include "arithmetic_expression.h"
#include <map>
int main() {
// arithmetic_expression expression1;
// Testing the RPN input
[Code] .....
C :: Program To Evaluate Postfix Expression Using Array Implementation Of Stack
Apr 26, 2014Write a program that evaluates postfix expression using array implementation of stack.
The expression [the input] is evaluated from left to right using a stack. When the element read from the expression is an operand, push it into the stack.When the element read from the expression is an operator: Pop two operands from the stack.Evaluate the two operandsPush the result of the evaluation into the stack.
The final result lies on the top of the stack at the end of the calculation. Make sure to display the result before terminating the program.Write a program that evaluates postfix expression using array implementation of stack.
Code:
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#define M 20
typedef struct{
[Code] ....
C :: Exponent Program - Expression Evaluates To A Function Which Is Missing Argument List
Dec 15, 2013I am new to C programming and I am trying to compile and run an exponent program my instructor posted for us but it is giving me an error saying:
Warning c4550: expression evaluates to a function which is missing an argument list.
Why this is happening (she doesn't seem to find anything wrong with the code). From what I could gather there is some issue with the math but idk. It is supposed to prompt for the number and the exponent to raise it to, then calculate and output the result.
Code:
#include <stdio.h>
int main() {
int base, exp;
long long int value=1;
[Code] .....
C :: Program That Will Allow A User To Enter Their Name
Jul 2, 2013I am trying to make a program that will allow a user to enter their name, from this point, three options should be present for the user to choose, then from that point, two more options should be present. I have if else statements in a switch case and I get the "undeclared" error for the a in the first " if(specificage == a) ".
NOTE: I use Code::Blocks.
Here is the code:
Code:
#include <stdio.h>
#include <string.h>
int main(){
char name[50];
char ageclass[50];
char specificage[50];
[Code] ....
C++ :: Program That Prompts User For Int Value?
Sep 23, 2013I'm making a program that prompts a user for an int value. The value input by the user must be a multiple of 16. If it is not, I must return an error message.
View 5 Replies View RelatedC++ :: Why It Is Runtime Polymorphism
Apr 4, 2013class Base
{
.....
.....
.....
virtual void display();
[code]....
in the above polymorphism why is it called runtime polymorphism when i can say seeing the code itself that display() function in derived gets executed with ptr->display(),so how does it become runtime polymorphism when i could get decide at compile itself ???
C++ :: How To Get Program Recognise User Input
Dec 8, 2013I need the program to do a calculation after the user inputs 10 numbers . This is what I have tried so far:
int count;
float value, high,low, sum,average;
sum=0;
count=0;
input:
printf("Enter a number (enter negative value to finish program):
");
scanf_s("%f",&value);
[Code] ....
output:
average=sum/count;
if(count==10) {
printf("total values :%d
",count);
printf("The Highest value :%f
Lowest Value: %f
",high,low);
printf("The average of the values is:%f
",average);
}
C++ :: Program That Accepts Two Input From User?
Dec 8, 2013I built a program that accepts two input from the user, using a array inside a loop, it is pass to a function inside a class which will display the two number, the problem is when the user is inputting a number and it is 1 the program continuously as the user to input a number, and when 2 is entered the program ask another number and end, but for example you entered 2 and 3. . . it will then outpu 2 and 4 (so 3 + 1 ) and always the last number is plus one. here is the code.
main.cpp
#include <iostream>
#include "newclass.h"
using namespace std;
[Code].....
C++ :: Program That Will Allow A User To Input Their First Name Into A String
Feb 23, 2015So we have a weekend assignment that is "Write a c++ program that will allow a user to input their first name into a string, and use the switch/case statement to produce the following output. Your Program should prompt the use rwith the numbers and the options for each (school, classification, and mood) allowing them to make a choice"
My issue is with the output. The output at the end is the number that they input and not the name of the case they chose, so if they chose option 1 for school it does not print out "BRCC" at the end for the output it prints a 1.
#include <iostream>
#include <string>
using namespace std;
int main(void) {
string name;
cout << "Please enter your name: ";
cin >> name;
[code].....
C++ :: Program That Accept Input For User ID
Oct 28, 2013I need a program to run that will accept an input for user id. It will take the customer input and capitalize the letters, and return invalid id with the user inputted values. Then if it's valid it will add a counter counting the number of letters and numbers. It will keep track until the user puts in !. It seems when I try to pass values from the array to my toUpper function to capitalize it it doesn't seem to work right.
View 3 Replies View RelatedC++ :: Program Skips Over User Input?
Dec 6, 2014I am so close to finishing this program of games, but I'm running into some issues while debugging it.
I've attached the google drive folder since there are several files (ignore the ones with [conflict], etc)...
First, I have the main menu using a switch to select the game. The default was set to exit. If initially when immediately opening the program you put in for say, a letter, it would exit like its supposed to. But if you went and played any of the games ], went back to the main screen, and entered a letter then, it would crash. I've put in a testing line to make sure that you enter a number, and not anything else.
Now however, if you play a game and then want to go back to the main menu, it will simply skip over waiting for your response and close the program. The same thing happens in the slot machine, I want to have it spin the slot machine by pressing enter, but it simply skips over the input, and I'm not sure why.
[URL] ....
C++ :: How To Allow User Input To Exit The Program
Feb 20, 2013I 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?
C++ :: Write A Program That Asks The User For A Name
Jul 2, 2014So I am trying to write a program that asks the user for a name. If the user enter the right name the program ends but if the user were to enter the wrong name the program would enter a loop prompting the user to re-enter the name. However I am not able to get the program to work!
View 9 Replies View RelatedC++ :: Runtime Stack Overflow
Jun 5, 2013Here is my error message: Warning1warning C4717: 'getx' : recursive on all control paths, function will cause runtime stack overflow
and here is my code I will Bold the part that is giving me problems!
class point
{
public:
point();
[Code]....
Visual C++ :: Switch From TXT To RTF During Runtime
May 2, 2015While running a Doc/View SDI, is there any way to switch from text mode to rtf mode during runtime? Search reveals nothing.
Say I have an editor and I want the app to use text, I can set the ctor as follows.
Code:
CEditorDoc::CEditorDoc() {
// TODO: add one-time construction code here
m_bRTF = FALSE;
}
But once I've done that and compiled the app, while it's running, is there a way for the user (or programmer) to change the mode back to RTF? One solution that occurred to me is to use 2 document classes, but that's a hassle.
C++ :: Declaring Array At Runtime?
Oct 21, 2012I can not set the size of my array while running porgrama. Is there any way to do this in C + +?
---- code ------
#include <iostream>
#include <string>
using namespace std;
[Code].....