Concatenate a string with an int.

[NemoStein]

Hello people, I'm having trouble trying to concat a string with an int type.
I want to put the value of the int inside the string.
The ideia is something like this:

int myInt = 265;
string myString = "The number is" myInt;
cout << myString;

The console should print:

The number is 265


But, doesn't matter what I try, the compiler (Dev-C++) always says:

invalid conversion from `int' to `const char*'

Or anything else saying that it's not possible...


What should I do to make this works?

[Duthomhas]

A string and an int are two incompatible types of things. You can't concatenate them.

You must first convert the int to a string.

You can have cout do it for you:
cout << "The number is " << myInt;

or you can #include <sstream> and use a string stream:

stringstream ss;
ss << "The number is " << myInt;
cout << ss.str();

Hope this helps.

[NemoStein]

The problem isn't print both together (the 1st option "cout"), but is put them together inside another string.

I have a function that calls another one and one of the params is the string... Something like this:

int myFunc(){
    int myInt = 265;
    string myString = "The number is" + myInt;
    anotherFunc(myString)
}

[Aakanaar]

Then do the second method

#include <sstream> at the top of the file

then

int myFunc() {
   int myInt = 256;
   string myString; // declare the string
   myString << "The number is " << myInt;
   anotherFunc(myString);
}

the <sstream> header will let you do the same as cout only storing the output into a string variable instead of printing to console.

[NemoStein]

Thanks, now it makes sence..
But, still having one problem:

int myInt = 100
stringstream myString;
myString << "You lose" << myInt << " HP";
myFunc(myString);

Dev-C++ says:

conversion from `std::stringstream' to non-scalar type `std::string' requested

[Duthomhas]

Aakanaar just forgot to use .str() to get a string out of that stringstream.

int myInt = 100
stringstream myString;
myString << "You lose" << myInt << " HP";
myFunc(myString.str());

Enjoy!

[Aakanaar]

Bah, sorry. I'm only human. :-)

I've not actually used stringstream yet, myself. I'm posting from what I''ve learned from reading threads on here.

[NemoStein]

Many many thanks, Duoas and Aakanaar.

Now works perfectly...


ps: Sorry Duoas, I don't gave enough attention to your 1st post...