How to make a string that consists on one character '-1'?

Question

I'm using a class that accepts commands as strings. Example ...

string cmd = "start";
connection->execute(cmd);

The 'disconnect' command is any string starting with the character '-1'. I tried doing this ...

string cmd = "0";
cmd[0] = '-1';
connection->execute(cmd);

But that produced this error ...

warning: multi-character character constant [-Wmultichar]

... how do I create a string that starts with char '-1'?

Answer 1

Just remove the quotes.

cmd[0] = -1;