If you do not have a constructor the Java compiler will create a no-arguments constructor for you. As soon as you provide a constructor which has arguments the no-argument constructor does not get created by the compiler. So if you add a no-arguments constructor to InVoice (like below) it should work. public InVoice() { } … Read more
Try to replace short RangeCheck(short word, short min, short max); char* prntword(short word); bool read(short *data, bool check); with short RangeCheck(short word, short min, short max){return 1;} char* prntword(short word){return 0;} bool read(short *data, bool check){return 0;} and it should compile for you (however it may not work as you expect) solved Undefined reference to … Read more
basically the compiler tells you whats wrong. It says, “class main is public, should be declared in a file named main.java”. Java has a naming rule, that a class inside a java file needs to match that file name. Example 1: Filename -> File.java inside that file: public class Main{ … does violate that rule … Read more
The reason you are getting the error is that some execution paths in your code do not set a value to hours. It is difficult to see this problem because you are mixing input validation with result calculation logic. You could just initialize hours to 0, but I suspect that your program still won’t work … Read more
I’m just going to focus on what is causing your error (I didn’t read most of your code). Pointers are one of the concepts in C that take a long time to learn, and you have a long way to go. A pointer is just an address in memory, nothing else. You can think of … Read more
from the book you mentioned in the comments. . just after this code … the statement in the book is : Whew! Aren’t you glad you don’t ahve to do that every time you use a variable ?? what you need is below : public static void main( String[] args ) { Scanner keyboard = … Read more
You cannot use: strcpy(Student.StudentGPA, “2.4”); strcpy(Student.StudentCredits, “31”); since Student.StudentGPA and Student.StudentCredits are of type double. Use: Student.StudentGPA = 2.4; Student.StudentCredits = 31; BTW, the line strcpy(Student.StudentMajor, “TECH”); will lead to undefined behavior since Student.StudentMajor doesn’t have enough space to hold those characters and a terminating null character. Make the size of Student.StudentMajor at least 5. … Read more
You really should make it a do…while loop: #define BROP(num, sum) do{ \ bool again = false; \ num = rand_lcg(generated); \ if (num % 2) { \ do { again = false; \ generated = rand_lcg(generated); \ if (generated < 512) \ sum -= generated; \ else \ again = true; \ } while(again); … Read more
return “”; just returns an empty string. If you put alist.get(i).getCountry() outside of the for loop it will not make sense. (I’m assuming that’s what you mean by “end the body with that.”) It depends on i, which only exists in the loop. It’s tough to see why you’re getting that error without seeing more … Read more
C doesn’t allow multiple assignment like that, set each variable to 30 in a different statement. 1 solved Can anyone explain what is the error in the following program?
throw LangException( builtin_classes::exception_class::create_ImportError( String::fromAscii(e.filename)-> append(String::fromAscii(“:”))-> append(String::fromInt(e.line))-> append(String::fromAscii(“:”))-> append(String::fromInt(e.col))-> append(String::fromAscii(“: syntax error: “))-> append(String::fromAscii(e.message)) ) // This closes the function call ; // You didn’t close the throw here! solved C++ “expected primary-expression before ‘(’ token” error
Is there a better way to fix this Yes, but not in stable Rust. You need non-lexical lifetimes: #![feature(nll)] #[derive(Debug)] struct Foo(u32); fn get_foo(bar: &mut Foo) -> Option<&mut u32> { Some(&mut bar.0) } pub fn test() { let x = 5; let y = 6; let mut a = Foo(x); let b = get_foo(&mut a); … Read more
Switch is a reserved word in Java. Used for the switch … case construct. You have named your method switch, which is not allowed. The first group of errors you are getting are because when you use j = switch(j), it sees the word switch as the start of a switch construct and then tells … Read more
Use this compileSdkVersion 27.0.2 buildToolsVersion ‘27.0.2’ implementation ‘com.android.support:appcompat-v7:27.0.2’ Instead of this compileSdkVersion 26 implementation ‘com.android.support:appcompat-v7:26.1.0’ 0 solved Error java.lang.NoSuchMethodError: No static method [duplicate]
You can’t put reader.close() between the try and the catch. Either put it in a finally block, or use a try-with-resources. Like, try (BufferedReader reader = new BufferedReader(new FileReader(filenameIn))) { reader.readLine(); for (int i = 0; i < personArray.length; i++) { String[] data = reader.readLine().split(“/t”); // <– should be \\t for tab. personArray[i] = new … Read more