Exercise 6.18

Write declarations for each of the following functions. When you write these declarations, use the name of the function to indicate what the function does.

(a) A function named compare that returns a bool and has two parameters that are references to a class named matrix.

(b) A function named change_val that returns a vector<int> iterator and takes two parameters: One is an int and the other is an iterator for a vector<int>.

Solution

/* compares the two matrices */
bool compare(matrix &m1, matrix &m2);

/* changes the value of the int pointed to by the iterator */
std::vector<int>::iterator change_val(int i, std::vector<int>::iterator it);