std::cin is the global stream object provided by the C++ standard library for reading from the standard input stream.
For more general questions about std::istream use the iostream or istream tags.
Questions tagged [cin]
1859 questions
0
votes
2 answers
cin.getline() without using string size
Is it possible to use cin.getline() without denoting an array size?
That is, with the following pseudo-code:
char array[15];
cin.getline(array,'.'); // '.' Is the delimiter.
Will this work?
Harjyot Singh
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0
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2 answers
Problems with cin
I'm using cin in 2 different ways: one way I'm just using cin (overloaded)>> variable, and the other way I'm using a function called read, which takes in an istream.
The code I have for it is:
cin >> string6;
cout << string6;
string7.read(cin);…
Jonathan Chiou
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2 answers
cin.getline() function not working properly after cin?
I am trying the following code:
int main()
{
char str1[20];
int a;
cout << "Enter Integer:"
cin >> a;
cout << "Integer:"<
Altaf Shaikh
- 729
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- 19
0
votes
1 answer
program skip over getline
I am suppose to create a program such that when 'y' is entered it will execute the code in the first do-while loop. however, when 'y' is entered it just skips over the chunk of codes!
Enter a phone symbols:
a
2
Continue (Y/y): y
Enter a phone…
Isabella Chan
- 41
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- 10
0
votes
2 answers
cin error in C++
I am writing a program that will calculate password strength according to two formulas. It requires the user to enter 2 passwords, one being eight characters or less and the other being 20 characters or more. The first parts executes with out…
user3064203
- 103
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0
votes
1 answer
Reading in both doubles and words and performing actions based on what is read
I'm writing a program that takes in input and formats it into a score as "Name Score".
Here is what needs to be done "Here's Moonglow's format.
The text file is composed of words. If a word is a number, then that is a student's score on a question,…
user3250013
- 5
- 3
0
votes
1 answer
using two getline(cin,s) in c++
There's something wrong with my code. I typed something and pressed enter after seeing "the first string"on the screen but I saw a empty new line instead of "the second string". Then I typed something again and pressed enter again. Then I had no…
Kevin
- 27
- 5
0
votes
2 answers
Why are there different values for input?
why does when enter 'q' ( or any char)
double x;
x = cin.get();
cout << x << endl;
return the char value for the character entered, but
double x;
cin >> x;
cout << x << endl;
returns a random value for 'q'
Bbvarghe
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0
votes
1 answer
cin into an array structure seems to input nothing
Trying to add a new record into my array of structure members.
I have the array populated initially through a file I/O, but trying to add in a new record (before saving to a file) leaves my fields blank.
//CONSTANTS
const int MAX_GAMEDATA =…
Cam Cole
- 3
- 2
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votes
1 answer
Reading a Text file with Mixed Input using cin and/or strings
I have just begun to tackle a coding problem I must solve, and am unsure how to get started and accomplish the task. There are multiple text files composed of words. If a word is a number, then that is a student's score on a question, so you add it…
jaredthecoder
- 315
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0
votes
3 answers
Why doesn't cin re-prompt if input value exceeds target type size?
I noticed while I was implementing a simple linked-list stack that cin doesn't re-prompt if I enter a value larger than the max. size of an integer. For example:
int input;
do {
cin >> input;
if (input == -1)
break;
else if…
Albert Xing
- 5,620
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0
votes
2 answers
c++ compile time error
I'm learning c++ and trying some things out... The following code is giving me a compile time error, can anyone explain to me why, I'm a little confused... I'm assuming it's the cin >> playagain statement. Thank you for the help. (also if I'm making…
Abdul Ahmad
- 9,673
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0
votes
2 answers
cin.get() getting too much
I want a user to enter a char. I want to filter what they enter and take only the first char they type.
int main(){
while (true){
char n = readOption();
cout << n << std::endl;
}
return 0;
}
char readOption() {
char…
Chronicle
- 1,565
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0
votes
1 answer
std::cin error state and variable changing
I thought that, if cin enters an error state, the variable it is streaming into remains unchanged. However, the following seems to be a counterexample:
#include
using namespace std;
int main()
{
cout << "Enter int: ";
int i = 5;
…
bcf
- 2,104
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0
votes
1 answer
C++ Console application cycle
I have console application and I first generate 10 students and then I add them to the Evidence (own double linked list). Then I'm removing student from Evidence, but after second (or highter) removal of student I have infinite cycle, because cin >>…
Pivoman
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