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1. What is wrong with this code? ``

cpp
#include <iostream>

T square(T value) {
    return value * value;
}

int main() {
    std::cout << square(3) << '\n';
}

``

The function is missing template <typename T> above it, so T is an unknown nameThe body must use value + value to square a numbermain needs a return 0; before its closing braceThe argument 3 must be written as 3.0

2. In the total template, why does the lesson write T sum{}; instead of T sum;?

Braces make the loop run fasterBraces turn sum into a reference to the first item in the listThe braces start sum at the default value for T, such as 0 for int, so it never holds an unknown valueThe compiler needs braces on every variable inside a template

3. What does this program print? ``

cpp
#include <iostream>
#include <string>

template <typename T>
T twice(T value) {
    return value + value;
}

int main() {
    std::cout << twice(4) << ' ' << twice(1.5) << ' ' << twice(std::string("ab")) << '\n';
}

``

8 3.0 abab8 3 abab16 3 abab8 3 ab

4. The call below does not compile. Why? ``

cpp
#include <iostream>

template <typename T>
T larger(T a, T b) {
    if (a < b) {
        return b;
    }
    return a;
}

int main() {
    std::cout << larger(1, 2.5) << '\n';
}

``

The < in the body must be >The int argument must be wrapped in std::stringWhen the types differ, the first argument wins, so the call prints 1The two arguments give T two different types, int and double, so the compiler finds no match

5. The unsigned integer type that the lesson uses for sizes and positions is std::___.

Type your answer.

Generic functions