std::getline does not work inside a for-loop

Question

I\'m trying to collect user\'s input in a string variable that accepts whitespaces for a specified amount of time.

Since the usual cin >> str does

Answer 1

Declare a character to get in the carriage return after you have typed in the number.char ws;int n;cin>>n;ws=cin.get(); This will solve the problem.

Using cin>>ws instead of ws=cin.get(),will make first character of your string to be in variable ws,instead of just clearing '\n'.

Answer 2

Are you hitting enter? If not get line will return nothing, as it is waiting for end of line...

Answer 3

You can directly use getline function in string using delimiter as follows:

#include <iostream>
using namespace std;
int main()
{
    string str;
    getline(cin,str,'#');
    getline(cin,str,'#');
}

you can input str as many times as you want but one condition applies here is you need to pass '#'(3rd argument) as delimiter i.e. string will accept input till '#' has been pressed regardless of newline character.

Answer 4

My guess is that you're not reading n correctly, so it's converting as zero. Since 0 is not less that 0, the loop never executes.

I'd add a bit of instrumentation:

int n;
cin >> n;
std::cerr << "n was read as: " << n << "\n"; // <- added instrumentation
for // ...

Answer 5

• Is n properly initialized from input?
• You don't appear to be doing anything with getline. Is this what you want?
• getline returns an istream reference. Does the fact that you're dropping it on the ground matter?

Answer 6

It's quite simple. U jst need to put a cin.get() at the end of the loop.