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Algorithms and programs - an introduction

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Olga Maartens
Olga Maartens

This document discusses how to write algorithms and programs to solve problems. It provides an example of writing an algorithm to find the sum of two numbers in words and pseudocode. It then shows how to write a program in Turbo Pascal to calculate the sum. The program prompts the user to input two numbers, adds them together, and displays the sum. The document aims to demonstrate how algorithms and programming can be used to solve problems in a straightforward manner.

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Algorithms and Programming Easier than you thought
First you have to find a solution to a problem Example: Find the sum of two numbers Formulate a solution in your own words
Your answer may look like this: Take two numbers Add them Display the answer (this is your solution in words)
Algorithm in words in pseudocode Take two numbers Add them Display the answer Enter num1 Enter num2 Sum num1 + num2 Write sum
Programming (Turbo Pascal) Enter num1 Enter num2 Sum num1 + num2 Write sum Writeln(Please enter a number.); Readln(num1); Writeln(Please enter another number.); Readln(num2); Sum := num1 + num2 ; Writeln(The sum of ,num1, and , num2, is ,sum, .)
In Turbo Pascal, your program should look like this: Program sum1; uses crt; var num1, num2, sum: integer; begin clrscr; writeln(Please enter a number.); readln(num1); writeln(Please enter another number.); readln(num2); sum:= num1 + num2; writeln(The sum of ,num1, and , num2, is ,sum, .) ; readln end.
Quite easily done!
THE END omaartens@nied.edu.na

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Algorithms and programs - an introduction

  • 2. First you have to find a solution to a problem Example: Find the sum of two numbers Formulate a solution in your own words
  • 3. Your answer may look like this: Take two numbers Add them Display the answer (this is your solution in words)
  • 4. Algorithm in words in pseudocode Take two numbers Add them Display the answer Enter num1 Enter num2 Sum num1 + num2 Write sum
  • 5. Programming (Turbo Pascal) Enter num1 Enter num2 Sum num1 + num2 Write sum Writeln(Please enter a number.); Readln(num1); Writeln(Please enter another number.); Readln(num2); Sum := num1 + num2 ; Writeln(The sum of ,num1, and , num2, is ,sum, .)
  • 6. In Turbo Pascal, your program should look like this: Program sum1; uses crt; var num1, num2, sum: integer; begin clrscr; writeln(Please enter a number.); readln(num1); writeln(Please enter another number.); readln(num2); sum:= num1 + num2; writeln(The sum of ,num1, and , num2, is ,sum, .) ; readln end.