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Program Example 4.3:

Finding average

The following is a C++ program that finds the average of 50, 70, 100 and 80. Chapter Four: Object oriented programming with C++
FOR ONLINE READING ONLY
#include<iostream>
using namespace std;
int main()
{
//Find average marks of 50, 70, 100 and 80
cout<<”Average of the marks is “<<(50+70+100+80)/4<<endl;
return 0;
}

The output will be average of the marks which is 75.

Installing a Borland C++ compiler

Activity 4.1:

Installation of Borland C++

Step 1: Download the complete version of Borland C++ Compiler.
Step 2: Copy the folder of Borland in the C drive.

Step 3: Write each step to install Borland C++ Compiler in your computer.

Errors in computer programming
When writing a computer program, you may make errors, such as incorrectly typing
a keyword, or you may forget to declare a variable within a program, or initialise a
variable with a wrong value. For example, you may write cot << “Hello, World! \n”;
instead of cout << “Hello, World!\n”;. once you do that, the compiler will complain.
Once an error has happened, you have failed to correctly adhere to the rules of writing
a computer program according to the language rules, and the compiler finds it.
If the compiler finds one or more errors during the compilation phase, it will not
translate the program to machine code, and as a result, such a program will not
run. However, once you fix such an error and compile the program, it will run
successfully.

There are four common errors that may occur when someone write a computer
program. These are syntax, semantic, logical, and run-time errors.

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Student’s Book Form Five

Computer Science Form 5.indd 233 23/07/2024 12:33