Week 4 Lab
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Warmup (Division and Modulo Idioms)
Perform one or more of the exercises below (specified by your lab instructor) related to use of division and modulo operations:
Then try to apply the appropriate idiom to the following exercises:
cpp/division-modulo/birth-year
cpp/division-modulo/sections
cpp/division-modulo/convert
Q&A on Material
if
,else if
, andelse
(conditional) statements
Tracing
Trace the execution of this program and predict what this program will output when the users types in 3
. Then repeat the exercise if the user types in 9
.
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int i;
char color = 'r';
cin >> i;
if (i % 5 != 0)
{
i++;
color = 'b';
}
if (i % 5 == 0)
{
i -= 2;
}
else if (i % 4 == 0)
{
i++;
if ((color == 'r') || (i == 9))
{
color='c';
}
}
else
{
i += 5;
color='g';
}
return 0;
}
Idioms Related to Conditional Statements
Take a look at the idioms related to if
(conditional) statements:
Exercises
Walk through these exercises and complete them as a group. Identify what idiom is most appropriate for each exercise.
cpp/cs102/practice6/tippingCalculator
cpp/cs102/decision-tree/menu
cpp/cs102/lookup-table/sales-tax
Open-ended Help
Any students with questions may stay after to get help. Please ask questions! Anyone else may leave at this stage.