How to Change a 0 to a 1 in a Java Code for Fractions
Changing a 0 to a 1 in the denominator of a fraction helps prevent a division by zero error in your Java program. In a fraction such as "2/3," the number 2 is the numerator and the number 3 is the denominator. Dividing by 0 is undefined in mathematics. The denominator can not be 0 and, if it is, change it to a 1 or ask for new input.
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Instructions
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Open your Java file in an editor, such as Eclipse, Netbeans or JBuilder X.
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Import the I/O namespace to enable access to the "readLine" function by adding the code at the top of your file:
import java.io.*;
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Retrieve a numerator and denominator value from the user by adding the code in your function:
BufferedReader buffread = new BufferedReader(new InputStreamReader(System.in));
String numerator = null;
String denominator = null;
int num = 0;
int den = 1;
System.out.print("Enter the fraction's numerator: ");
numerator = buffread.readLine();
System.out.print("\nEnter the fraction's denominator: ");
denominator = buffread.readLine();
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Convert the user input from a String into an integer by adding the code:
num = Integer.parseInt(numerator);
den = Integer.parseInt(denominator);
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Check if the denominator is equal to 0 and, if so, replace it with 1 by adding the code:
if (den == 0) den = 1;
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Save the file, compile and execute the program to change a denominator of 0 to 1.
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