cpp declaration of string with a char

Question

I am referring to this post on how to create a string from a char in cpp.

c is a charactor and inputstr is a vector of strings. As stated, if I do this

string str2(1,c);
inputstr.push_back(str2);

it works and inputstr gets a str append to the end but not when I do

inputstr.push_back(string str2(1,c));

It throws an error: expected primary-expression before ‘strx’ inputstr.push_back(string strx(1,c)); What does the error mean? is it because cpp does not support in line declaration, I would expect a different error in that case.

You want inputstr.push_back(string(1,c));.

songyuanyao
– songyuanyao

2017-10-27 01:22:35 +00:00
Commented Oct 27, 2017 at 1:22 — songyuanyao
– songyuanyao, Commented Oct 27, 2017 at 1:22
The error means that this is not valid C++.

Sam Varshavchik
– Sam Varshavchik

2017-10-27 01:22:44 +00:00
Commented Oct 27, 2017 at 1:22 — Sam Varshavchik
– Sam Varshavchik, Commented Oct 27, 2017 at 1:22

Iharob Al Asimi · Accepted Answer · 2017-10-27 01:22:29Z

2

But,

inputstr.push_back(string(1, c));

should work.

In your example, you are attempting to declare a variable in an invalid place and that is not valid code, so the compilation fails. In this example, you are simply instantiating a string object and passing the instance to push_back(). You don't need the variable in this case.

answered Oct 27, 2017 at 1:22

Iharob Al Asimi

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