C/C++ :: Do While Loop Not Working - Exits After Input

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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C++ :: Loop Not Working User Input?

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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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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Apr 29, 2014

Code:

#include <stdio.h>
#include <stdlib.h>
void f(char letter,char *str) {
int i=0;
char CAPletter = 'A' + letter - 'a';

[Code] .....

OUTPUT:
//substrings starting with 'letter'
name
niros
NIce

Everything works but program quits and don't stay in console.

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Dec 8, 2014

The while loop part of my program isn't working right. stringOriginal is an array. If a large amount of characters passed the max 80 im processing is typed, it goes into a infinite loop. Also the condition doesn't work i type in quit and the loop continues.

while(stringOriginal != "quit"){
std::cout << "Enter a string of characters you would like to reverse
";
cin.getline(stringOriginal,79,'
');
}

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Code:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <SDL/SDL.h>

[Code]....

I don't know why since I've assigned a value like that to a variable of that same type before. Unless I had garbage data somewhere and didn't realize it.

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Jan 17, 2015

I just started learning programming. I tried using this but the loop is not working ....

Code:
#include<stdio.h>
#include<ctype.h>
#define PI 3.1416
void main(void) {
char choice;
float r, area;

[Code] ....

However when i removed this portion below, and replacing it with choice='Y';, the loop works just fine although my intention is to continue the loop only when 'y' is entered.

Code:
printf("Continue? Y/N:");
fflush(stdin);
scanf_s("%c", &choice);
choice = toupper(choice);

I think that I'm using the code wrongly but i'm not sure where the mistake lies in

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May 16, 2014

does memory reserved by malloc() get freed when the function it is called in finishes?

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Basically I'm having trouble reading more than one character.I want the user to input character traits(ie, w, a), if two traits are entered they get the job.

But I cannot get my program to read more than one character input.

This is what I have so far...

#include <iostream>
using namespace std;
int main(){
char input;
int count = 0;

[Code] .....

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Mar 24, 2013

Why my output screen for this program does not want to stay open. It only opens for a split of a second and it's gone. The program is supposed to take numbers from a input file and display and save the manipulation in the output file. Here is the program.

Code:
#include<iostream>
#include<fstream>
#include<iomanip>
usingnamespace std;

[Code] ....

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Feb 22, 2013

I wrote code for printing a double triangle. Its woking fine upto input is 7. but when the input is 8 the output is disturbed. the code is this.

#include<iostream>
using namespace std;
int main() {
int a;
cout<<"Enter a number"<<endl;

[Code] ....

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Feb 22, 2013

I'm having troubles with this program I made. Put it simply, it's a basic program using Queues. Whenever I try to input a value, my compiler(Dev C) suddenly stops working. The .exe file crashes and I've no way on how I can execute my program.

Code :
#include<iostream>
using namespace std;
int *queue;
int rear, front, queueSize;
void enqueue();
void dequeue();
void display();

[Code] ....

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Mar 23, 2014

I wrote this program to create a list of medical resources and their attributes, a task I have been performing repeatedly lately. I'm still fairly new to C++, so I thought to create a structure "Resource", and then an array of those structures "city[300]". My problem is that the input doesn't seem to be happening: the program runs, but when it prints to screen/writes to the file at the end, all the shows is:

Resource Type:
Name:
Address:
Phone:
Website:

for every resource that was input. All the fields are blank.

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
struct Resource {
string typeID;
string name;

[Code] ....

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C++ :: While Loop Keeps Asking For Input After EOF

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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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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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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C++ :: While Loop Keeps Looping Without Getting Input From User

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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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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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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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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