NEED HELP WITH C PROGRAMMING

// Task 1 // For this function, you must return an integer holding the value // x+1, however you may not use any constants or the symbol '+' // anywhere in your solution. This means that // // return x - (-1); // // is not a valid soltion, because it uses the constant -1. // // Hint: Consider what internally happens when you do -x. int plus_one(int x) { return x; }