Inputting strings on gcc compiler

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Can anyone help me in inputting strings on gcc compiler?
i want to input a string using string class
i used getline() but it didn't work.
what can i use to do so?
and also i want to input lines of strings to calculate no. of lines
so how can i do that?
i m new to gcc compiler please tell me what can i do?
thanks in advance....

Here is the sample code my original code is in my college i used the functions as follows:
using namespace std;

#include "iostream"
#include "string"
void temp()
{
    string s;
    getline(cin,s);//this didn't worked, it was skipped
    cout<<s; 
}

int main()
{
        string s;
        getline(cin,s);   //This function worked
        temp();
        return 0;
}

this is just the sample code when i call getline(cin,s) inside main() it works and allow me to input a sentence
but problem is when i call it inside any function other than main() it doesn't work.

Posted 17-Feb-13 23:15pm

Member 8536324

Updated 18-Feb-13 23:21pm

v4

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Comments

Fredrik Bornander 18-Feb-13 5:50am

Show us how you used getline() so that we can tell you why it didn't work.

enhzflep 18-Feb-13 7:00am

If you want to use the std::string class, you should be using cin.
I.e
string yourStringVar;
cout << "Enter a string: ";
cin >> yourStringVar;
cout << "you entered: " << yourStringVar;

Member 8536324 18-Feb-13 9:58am

it accepts only one word sir

Member 8536324 18-Feb-13 9:56am

Sir, I used getline like getline(cin,Stringvariable);

Member 8536324 18-Feb-13 9:58am

Actually it worked but only in main() if i use it inside any member function of class it doesn't work and not even in member functions but also in non-member functions it didn't work.

YvesDaoust 18-Feb-13 12:24pm

A silly question: did you ever... call these functions or methods ?
And if yes, did you ever... pass some arguments ?

Member 8536324 19-Feb-13 5:17am

Yes i called those functions but the getline() was skipped at that time

YvesDaoust 19-Feb-13 5:21am

How do you know it was skipped ?

Member 8536324 19-Feb-13 5:22am

sir it didn't ask me to input the string

YvesDaoust 19-Feb-13 5:28am

As far as I know, getline does not "ask" anything. It is an input-only function and does not emit any message. What makes you think the behavior differs when called from main() ?

Member 8536324 19-Feb-13 5:30am

i know sir it does not emit any message but it can be used for input as i used that statement was skipped

Member 8536324 19-Feb-13 5:31am

suppose if i write like
cout<<"Enter any string";
getline(cin,s); //this statement was skipped

Member 8536324 19-Feb-13 5:32am

i don't know what happened but the getline was skipped when i call it inside any function. you can try it

Member 8536324 19-Feb-13 5:24am

i am just trying to input the string inside the function and display it there in that function only

Member 8536324 19-Feb-13 5:25am

ok is there any other way that i can use to input the string?
i used cin but it accepts only one word

YvesDaoust 19-Feb-13 5:31am

You should use the third argument to getline and specify the newline character as the string delimiter, otherwise space will be taken by default.

Member 8536324 19-Feb-13 5:33am

ok and what if i want to input lines of strings

Member 8536324 19-Feb-13 5:34am

this will allow me to input only one line

Maximilien 18-Feb-13 11:14am

Show us the code
(edit your original question).

2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Accepted Answer · 2013-02-18T07:07:00

Your function temp accepts a string into a temporary variable. Then, when it returns to main the temporary variable s goes out of scope and is destroyed. You code should be:

C++

string temp()
{
    string s;
    getline(cin,s);//this didn't worked, it was skipped
    return s;
}
 
int main()
{
    string s;
    s = temp();   //This function should now work
    return 0;
}

YvesDaoust · Accepted Answer · 2013-02-18T23:32:00

Solution 2

Use getline(cin, s, '\n');

C++

do
{
    getline(cin, s, '\n');

    // Process the line
    ....
}
while (s.length() > 0);

Posted 18-Feb-13 23:32pm

YvesDaoust

Updated 18-Feb-13 23:52pm

v2

Comments

Member 8536324 19-Feb-13 5:35am

thanks a lot sir

Member 8536324 19-Feb-13 5:35am

i will try

Inputting strings on gcc compiler

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