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CS and the Honor Code
Alternate final exam
•I relented. Will offer final Th Mar 20 12:15-3:15pm. Absolutely NO
other alternates.
Cafe hangout today after class in Terman — join us!
Today’s topics
•C++ syntax and structure, procedural paradigm
•User-defined types, parameter passing
Reading
•Handout 4, Reader Ch. 1, 2.1, 2.6 (today)
•Ch. 3(next)
Lec ture #2
C++ vs Java: what’s the same?
General syntax
•comment sequence
•use of braces, parentheses, commas, semi-colons
•variable/parameter declarations, function call
Primitive variable types
•char, int, double, but note Java boolean is C++ bool
Operators
•arithmetic, relational, logical
Control structures
•for, while, if/else, switch, return
Dissecting a C++ program
/*
* average.cpp
* ------------
* This program adds scores and prints their average.
*/
#include "genlib.h"
#include "simpio.h"
#include <iostream>
const int NumScores = 4;
double GetScoresAndAverage(int numScores);
int main()
{
cout << "This program averages " << NumScores << " scores." << endl;
double average = GetScoresAndAverage(NumScores);
cout << "The average is " << average << "." << endl;
return 0;
}
/* Function: GetScoresAndAverage
* Usage: avg = GetScoresAndAverage(10);
* -------------------------------------
* This function prompts the user for a set of values and returns
* the average.
*/
double GetScoresAndAverage(int numScores)
{
int sum = 0;
for (int i = 0; i < numScores; i++) {
cout << "Next score? ";
int nextScore = GetInteger();
sum += nextScore;
}
return double(sum)/numScores;
}
average.cpp (cont’d)
