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"cin cannot be resolved" [message #1849231]

Sun, 09 January 2022 18:34

Debbie Davis

Messages: 1
Registered: January 2022

Junior Member

I am a beginner in learning java. The following simple program gives me several error messages of "cin cannot be resolved"

package testingProject;
public class MainClass {
public static void main(String[] args) {
// TODO Auto-generated method stub

double angle1, angle2, angle3;
System.out.print("Enter 1st angle: ");
angle1 = Double.parseDouble(cin.nextLine());
System.out.print("Enter 1st angle: ");
angle2 = Double.parseDouble(cin.nextLine());
System.out.print("Enter 2nd angle: ");
angle3 = 180 - angle - angle2;
System.out.println(angle3);
}

}

Error messages:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
cin cannot be resolved
cin cannot be resolved
angle cannot be resolved to a variable

at testingProject.MainClass.main(MainClass.java:10)
What should I do to fix it?

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Re: "cin cannot be resolved" [message #1849234 is a reply to message #1849231]

Sun, 09 January 2022 23:11

Nitin Dahyabhai

Messages: 4165
Registered: July 2009

Senior Member

This isn't really a Java programming forum. You might want to ask in https://coderanch.com/f/33/java . That said, you should
have been getting error messages in the Java Editor indicating that cin and angle can't be resolved,--you have not
declared either of them as local variables.

Nitin Dahyabhai
Eclipse Web Tools Platform

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