C :: Initialize For Loop Using Input From Keyboard?
Feb 22, 2015
I'm not finished with this code, but I am stuck on this one glitch. This is what I have so far, and it's not working.
Code:
int main() {
/*Please input an n value greater than zero. Otherwise, exit the program by entering a carriage return*/
printf("Please input an n value greater than zero. Otherwise, exit the program by entering a carriage return
");
int summation = 0, x, y;
scanf("%d", y);
for (y == x; summation <= M_E && x <= 34; x++)
[Code] ....
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Mar 30, 2014
I'm trying to write a C++ program that will allow a user to input a number from the keyboard. Then using a loop, that will perform 10 times, multiply the entered number by the loop counter. Print out the loop counter, the entered number and the product of the loop counter and the entered number. A one-time heading should be displayed before information is printed.
This kinda of what I have so far:
#include <iosteam>
using namespace std;
int main () {
Start
Declare: numScores, sum, score, avg, SENTINEL = 200
numScores = 0
[Code] ....
All the programs I have tried to make are not working?
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Jun 21, 2013
I have written a program, in which I create a NxN-matrix. As I need some different samples (some different such NxN-matrices), I try to create a new matrix in each recall of a while-loop. The first recall of the while-loop works without any problems, but the second recall crashes, but I get any errors from the compiler. Here is my quell code. The problem should be with line 44:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
[Code].....
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Apr 4, 2013
I've been messing around with loops/functions and basic logic and come up with a small maths program. Here it is:
Code: #include <iostream>
#include <string>
float divide (float x, float y) //function to divide numbers {
return x / y;
[Code] ....
Would initializing the string 'anotherGo' to a value that makes the loop run at least once be a suitable way of doing this rather than using a do/while loop? I read that a do/while loop is a black sheep but I have come across a number of uses for it. Maybe it is just preference which one you should/could use?
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Aug 31, 2013
I am trying to get my keyboard input into a function, so that I can call a function like updatebuttons() and set global variables to 0 if the button is not down at the moment and 1 if it is. It seems simple, but I can't seem to get it to work right; I am not use to working outside of windows, so I am still a beginner with SDL.
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Oct 12, 2014
Intead of using scanf("%d",&a) to take a input from the user,how to take a input using fgets(buffer, BUFFERSIZE , stdin) and atoi?
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Nov 22, 2013
at the moment my program is extracting keyboard data through accessing the virtual key states. However, it is not performing as I intended because the data I receive from the console does not concur with the actions the user performed.
E.G. When I type, it comes out like this.
what I get with my program: WWhhhheeen III typeeee, iiit ccoommes oout lllikkke thhhhiiis
TLDR: so basically Id like to know how other programs know how to interpret keyboard input, so that when I type I dont get multiple inputs of the same key press
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Mar 13, 2014
I am writing an software that should be able to detect all keyboard inputs by the user. i.e., both hardware and software/on-screen keyboard.
This software is going to be written in a platform independent way and supposed to run on Windows, Linux, Android & iOS.
The idea is to capture the keyboard inputs from a low level, there by making sure that it doesn't miss any inputs even if it's a on-screen keyboard like in a mobile device.
I am looking at possible open source libraries that can be used.
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Nov 26, 2014
I'm trying to simulate a ctrl+ keypress into a running application.
Code:
#include <stdio.h>
int main (void) {
system("/usr/local/bin/rundb");
}
My problem is that the rundb program needs the user to type ctrl-b then s to actually start executing. What is the best way to handle this automatically? Some sort of fork/pipe?
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Nov 18, 2013
I am trying to Write a program that inputs three integers from the keyboard and prints the sum, average, product, smallest and largest of these numbers. How do i go about it. What i dont know is how to come up with smallest and largest number .
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May 11, 2013
This is an example from C++ Primer on while loops shortened for simplicity:
int main() {
int value = 0;
while(cin >> value) cout << value;
return 0;
}
When I compile and run the above code the program keeps asking for input after I input nothing but pressing ENTER no matter how many times. The only way I can get it to stop asking for input is to input something other than an int such as a char or string. Program executes as intended after that. I have googled this issue and read all seemingly relevant results and nothing seems to pertain to my exact problem. I think it may have something to do with my computer's own settings or something and am baffled as to what it may be.
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Aug 14, 2014
// PROBLEM - Use INPUT VALIDATION so number entered is positive. I can't get it to work
#include <iostream>
#include <iomanip>
using namespace std;
int main(int argc, const char * argv[]) {
// SUM OF NUMBERS
// Enter a positive integer
[Code] ....
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Sep 5, 2014
I have a small loop that gets the user input, as well as acts as input validation to make sure he or she doesn't enter a value that is not within the specified range.
The user is supposed to enter a month number. E.g. if he or she chooses February, then enter 2, or December, 12.
It works correctly if they type a number that is not in the range, but goes into an infinite loop if, say, they type a string such as "month".
Code:
int main() {
// Variable Declaration(s)/Initialization(s)
int month=0;
// Get input
cout<<"Enter a month";
cin>>month;
[Code] ....
How could I go about revising this?
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Jan 20, 2013
Some of my loop is not working. How messed up is this code.. Commented non working code
// ADIT.cpp : Defines the entry point for the console application.
#include "stdafx.h"
#include "windows.h"
[Code]....
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Jul 31, 2013
I'm trying to get this program to loop the number of times I get it to input. The program compiles alright, and it does loop when I tell it too, but how do I output the grades of the multiple students?
#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
#include <cstdlib>
int weighted1 = 0;
int weighted2 = 0;
[Code] .....
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Dec 5, 2013
struct stu_dat //outside main function
{
int rollno;
char name[45],
float average;
[Code] ....
No compilation problem.when executing prompt waits for inputting rollno, but, as soon as i enter a char string it keeps looping displaying the "want to enter more data?".i cant understand what is going on,as there is no compilation problem and runs good till i input the name.
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Dec 13, 2014
In short, I'm trying to make a CLI for a project that can take multiple user inputs add I don't exactly know what I'm doing. I'm able to get cin to take one user input, but that's all I'm sure about.
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Feb 6, 2014
My code:
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int factorial(int n);
int main() {
int n,num;
do {
[Code] ....
My while loop is not working... it exits after 1 input...
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Sep 15, 2014
I'm not sure what the program's purpose is?
1) Ask the user to enter a sentence. Until you reach the end of the sentence, test each character to count the number of spaces and letters.
2) For every space counted, print "SPACE", then print one "!" for every letter counted on an indented line underneath the "SPACE".
Your test sentence to use is: "The potash feldspars are important rock-forming minerals in plutonic, volcanic, and metamorphic rocks."
HINT: You do not need any strings. You need one while loop and two for loops. <cctype>
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Sep 24, 2014
The purpose of this program is to unscramble the user's input. for example if the user entered 'ftooabll' the program would print 'football'. find the error that I am making....
Now, this only works for strings that are contained in the file wordlist. That being said, I would like this to repeat this search multiple times. Currently, the process is being repeated 7 times, but it only works on the first iteration. The code and sample input/output is below.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define NUMLOOP 6
void sort_string(char*);
[Code] ....
Sample input/output: (note: all data has been verified to be in the wordlist)
Enter string:
4132dcba
abcd1234
Enter string:
4132dcba
Enter string:
4132dcba
Enter string:
4132dcba
Enter string:
4132dcba
Enter string:
4132dcba
Enter string:
4132dcba
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Mar 6, 2015
So I have to write a step in my program that reads in up to 8 variables. Simple, but if the User submits an invalid value, I have to give an error message and ask him to re-enter the value until he enters a valid number. Here's my while loop that works perfectly:
Code:
while (true) {
printf("
Enter the mark given by Judge 1: ");
scanf("%f", &m1);
if ((m1 >= 0.0) && (m1 <= 10.0)) {
break;
}
[code]...
I'm not sure what to write in the else statement to make the programme understand that it has to repeat the exact same step but without adding 1 to index. Is this possible or do I have to suck it up and just use while loops instead? I'm very new to programming.
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Jan 23, 2014
so i got this piece of code today having some slight errors with it, how its actually done as i want to know where i have gone wrong here is the code .. Using a for loop to input and output array values
*/
#include <stdio.h>
int main(void) {
/* Declare an array of integers */
int Grades[5];
int nCount;
/* Populate the array */
for(nCount = 0; nCount < 5; nCount++)
[Code]...
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Mar 4, 2014
I don't understand why my Do While loop skips over the input the second time round?
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <string>
using namespace std;
//prototype
string reverseInput(string *);
[Code] ....
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Oct 18, 2014
I just started programming and want to make the game cows and bulls. The problem is that after the loop has ended and both vectors are not the same I want the user to 're-input' the starting variables a,b,c&d but I don't know how to.
Code:
#include "std_lib_facilities.h"
int comparison(int a, int b, int c, int d)
{
vector<int>bc={ 1, 2, 4, 9 };
[Code].....
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Apr 28, 2014
I need starting a do-while loop in my program that runs up to 10 time that asks the user to enter up to 10 scores, which include the slope and rating for the course, and calculates the handicap for each score. Here's what I have so far:
//This program calculates a golfers handicap.
#include <iostream>
#include <string>
using namespace std;
int main(){
int score, slope;
double rating, handicap;
[Code] ....
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Dec 31, 2013
I'm working on a code that needs to loop a switch case back to the beginning after a certain input is entered.
ex) Code:
printf("Select an option);
printf("1. Play game");
printf("2. Status");
printf("3. Exit");
scanf("%i", &userinput);
switch(userinput);
[Code]...
For my program, I want option 2 to display something, then loop back to "select and option" after the user presses enter. How would I write that? Would i use a while? do while?
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