Writing Functions

Reusable Code Blocks

int add(int a, int b) {
    return a + b;
}

int result = add(3, 5);  // 8

Void functions — no return value

void greet(string name) {
    cout << "Hello, " << name << "!" << endl;
}

Forward declarations

int multiply(int a, int b);  // declare first

int main() {
    cout << multiply(3, 4);  // can use it here
}

int multiply(int a, int b) { return a * b; }  // define later

Your Task

Write two functions:

• clamp(int val, int lo, int hi) — returns val confined to [lo, hi]
• absVal(int n) — returns absolute value without using abs()