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 — cs-142:find-the-max-of-three-integers [2015/05/19 11:37] (current)cs142ta created 2015/05/19 11:37 cs142ta created 2015/05/19 11:37 cs142ta created Line 1: Line 1: + = Find the max of three integers = + == Problem == + * The max function that is declared in the <​algorithm>​ header returns the larger of its two arguments. Write a program that reads three floating-point numbers, uses the max function and displays the larger of all three inputs + == Solution == + + /* + Test case 1: + Inputs: 5,6,7 (three different numbers) + Expected Output: 7 + Actual Output: 7 + Test case 2: + Inputs: 5,6,6 (two numbers the same) + Expected Output: 6 + Actual Output: 6 + + Test case 3: + Inputs: 5,5,5 (all three numbers the same) + Expected Output: 5 + Actual Output: 5 + */ + #include <​iostream>​ + #include <​algorithm>​ + + using namespace std; + + /* + Find the max of three integers + @param int1 first integer + @param int2 second integer + @param int3 third integer + @return the max of int1, int2, int3 + */ + int find_max_of_three(int int1, int int2, int int3) + { + int return_var; + + // code to modify return_var to be max of three ints + + // find the max of the first two, keep track of that + int max_of_first_two = max(int1, int2); + + // find max of the last and the result of previous step + return_var = max(max_of_first_two,​ int3); + + //this is an alternate way to do this: + // return_var = max(max(int1,​ int2), int3); + // the inner-most function is evaluated first + + return return_var; + } + + int main() + { + cout << "Give me three integers: "; + + // declare three storage variables + int a, b, c; + + // read in three integers without checking for bad input + cin >> a >> b >> c; + + // function to find max of three numbers + int max = find_max_of_three(a,​ b, c); + + // print result + cout << "The max of " << a << ", " << b << ", and " << c  << " is " << max << endl; + + system("​pause"​);​ + return 0; + } + 