C :: Flushing Input And Why Do Have To Hit Enter Key Twice
Mar 6, 2015
I wrote a program that reads user input string using fgets() function. After this, program will ask if the user wants to save the string to file or does the user want to change the string or quit without saving. If user wants to change the string this must be made possible by asking for the string again. After this, menu will be printed again printing the choices available.
I had to flush stdin before getting changing input! However, problem is "Why do I have to hit return key 2 times, when I choose 2 and input string again." (I use code block 13.12 with windows 8.1 laptop) */
Code:
#include <stdio.h>
#include <string.h>
#define MAX 50
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;
When the program is processing/sleeping, those char input at that time would not goes into the buffer until the next input request (such as calling istream::get). The program below shows this.
I wonder if there is a way to distinguish between the input comes from the time that does not request it (i.e., during processing or sleeping) and those comes after the time does request it (in the example, after "Input something: ").
I'm trying to validate my input. I require for the user to enter six doubles and if they don't then I want them to re-enter the information. Here is my code:
Code: while (1>0) { printf("Please enter arguments in the order: negative mass, positive mass, initial x-position, initial y-position, initial x-velocity, initial y-velocity: ");
if ( scanf("%lf %lf %lf %lf %lf %lf",&MassMinus,&MassPlus,&Pos[0][0],&Pos[0][1],&Vel[0][0],&Vel[0][1]) != 6) { printf("Not all numbers were assigned!
[Code] .....
At the moment it just waits if you enter less than six numbers and if you enter any more than 6 it just ignores anything after the sixth number (so pretty much does nothing). Also if I entered 1 2 a b 3 4 instead of entering six numbers it would register that as 1 2 0 0 3 4 but I want it to make the user input the numbers again. I'm also aware that "while (1>0)" isn't good programming form but I'm not really sure what to use instead?
When the user gives no input, they have to press enter twice before "Done." is printed.
cout << "What do you want the name of your page to be? "; std::getline(cin, pageTitle); if (cin.get() == ' ') pageTitle = "Welcome to Website."; cout << "Done. ";
Is there a way to print "Done." after pressing enter once?
Code: #include<iostream.h> #include<conio.h> #include<string.h> void main() { clrscr(); int i=0,flag=1; cout<<"Enter the password.";
[Code] ....
When I input the password, the Backspace and the Enter keys are not working as they should. Also, I want to know if I can press enter only once to input the password, not twice.
how can i make a program which allows a user to enter an input for a time interval for example i ask a question and sets the input to be entered within 10 seconds...
How would you be able to show both outputs celsius and Fahrenheit and my temperature conversion is coming up wrong when i enter in the input. here is my code...
#include<iostream> using namespace std; int main(){ double celsius; double fahrenheit;
It seems to be going null. I can't get a null value, I want it to accept input till the user hits enter with no text typed. I've tried checking to see if the input is NULL, "", and " " all to no avail.
Code: #include <stdio.h> #include <sys/shm.h> #include <sys/stat.h> #include <iostream> #include <fstream> #include <string.h> #include <cstring> using namespace std; int main() { string info = "";
Currently I am working on a program where you enter in a date 14 03 2013 (Day, Month, Year) and you get the next day. I seem to be coming stuck with months with less than 31 days, and the whole leap year thing. Here is my code so far.
Code: #include <stdio.h> int day, month, year, next_day, next_month, next_year, calculation; int main() { printf("Enter a date in the form day/month/year: "); scanf("%d %d %d", &day, &month, &year);
The following 2 codes are almost identical, only that the switch statements are slightly different. The 2nd code has the issue of requiring an additional enter key to be pressed when I enter '3' as input to exit the program.
Working code :
Code:
#include <stdio.h> #include <ctype.h> #include <string.h> void clearKeyboardBuffer() { int ch; while ((ch = getchar() != '
I 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) ".
i just want to break the loop when user hit ENTER.But after that programm is stil working, i don't know why, becouse i have a code just like in book, i spend a lot of time with it.
int getinfo(student pa[], int n){ cout << "START" << endl; int i = 0; for(i; i < n; i++) { cout << "Studetn name"; char name[SLEN];
I want to do simple program to capture some 5 surnames of people(employees) - using array and pointers. Well I understand a bit of arrays and I know how to loop through.
How can achieve this? This holds the key to my understanding how pointers work and can be used with char or strings.
I am working on a database project, which can store (initially) 10,000 marksheets with following capabilities
1) new entry 2) edit/modification of entry 3)delete entry 4) separate Departements ( BBA, BCS, M.Phil, Phd., etc.) 5) can store data on files ( initially, all data is stored in a single file)
Now, I want to create a menu, in which i can use arrow keys to navigate through the menu and use Enter key fo selection.
What should i use in it?? The project is only on C language.
fprintf(stderr, "Data is %s when first entering ins_llist loop. ", data); q = malloc(sizeof(struct lnode)); if ( q == NULL ) return(NULL); }
[code]...
Trying to figure out a way to sort as i enter my data into the llist. What is in red and blue is what I've been messing around with to try and see if maybe i can get it to sort but it is not. When i flip sign, the order changes opposite, but i cant see how to sort each item as i go. Maybe i am too tired right now, lol, been working on this program for what feels like 30 of the past 24 hours haha.
After running, It's supposed to enter an integer for x. what will happen if I enter a char instead of integer? which value will be in &x and x itself? I have a script and I get strange result while entering a char instead of integer for x.
