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CPA: Programming Es sentials in C++

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Lab 1.4.2 Ints: operators and expressi expressions ons Objectives Familiarize the student with: shortcut and pre/post increment/decrement increment/decrement operators;  buildi  building ng simple simple expression expressions; s; translating verbal description into programming language; testing code using known input and output data.

Scenario Take a look at the code below: it reads two integer values, manipulates them and finally outputs the k  variable.  variable. The problem is that the manipulations have been described using natural language, so the code is completely useless now. We want you to act as an intelligent (naturally!) compiler and to translate the formula into real C++ notation. Try to use pre/post and short-cut operators operators – they fit perfectly into into some of the s teps. Test your code using the data we've provided.

#include  using namespace std std; ; int main(void) { int i, j, k;

cout << "Enter i: "; cout << "; cin >> cin  >> i; cout << cout  << "Enter j: " "; ; cin >> cin  >> j; // // // // // // // // // //

increment i by 2 decrement j by i divide i by j giving k increment k by k decrement k by 1 assign k modulo i to j increment k by k added to i increment k by k divided by j assign k times k times k to k increment k by i times j

cout << k; cout << return 0; }

Example input 100 3

Example output 261838

© 2017 C++ I nsti tute . A l l ri gh ts re s e rv e d. Las t u pdate d : March 07, 2017 | w w w .cpp i nsti tute .org

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Lab 1.4.2 Ints: operators and expressi ons

Example input 3 100

Example output -5

Example input 123 321

Example output -125

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