CODEWITHSUNDEEP
c++stringvector
Blake Morgan
Blake Morgan

Reputation: 775

Concatenate vector size to string

I'm trying to concatenate a string with a vector size. Whatever method I use, I don't get the desired output. When I use cout it prints fine and when I look at the value of the string in my debugger, it appears as Schemes(\002). Problem is: I need to return a string, rather than print straight to the console, so I can't use cout; I must use concatenation. Why is the string and the vector size not concatenating as expected?

Desired string: schemes(2)

Outputted string: schemes()

Code:

using namespace std;    

string s;
vector<Object> schemes;

// Add two elements to vector

// Method 1 (doesn't work)
s += "Schemes(" + schemes.size();
s += ")"; // I can't put this on the same line because I get 'expression must have integral or unscoped enum type' error

// Method 2 (doesn't work)
s += "Schemes(";
s.push_back(schemes.size());
s += ")";

// Method 3 (doesn't work)
s += "Schemes(";
s.append(schemes.size());
s += ")";

Upvotes: 0

Views: 1074

Answers (1)

Daniel
Daniel

Reputation: 854

schemes.size() is an integer type. This means you're trying to concatenate an integer type to a string type.

Try 

s = "Schemes(" + to_string(schemes.size()) + ")";

Upvotes: 3

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