Any non-zero number or non-null pointer is considered to have a logical value of “true”, whereas a number with value 0 or a null pointer is considered to have a logical value of “false”. The ! operator is the logical NOT operator (as opposed to a bit-wise NOT operator). It inverts the logical value of … Read more
If it helps you to understand, you can rewrite it from AND to OR: while (command != “quit” && command != “q”) { // do job } is equivalent to while (!(command === “quit” || command === “q”)) { // do job } https://en.wikipedia.org/wiki/De_Morgan%27s_laws 5 solved OR and AND operator confusion in Javascript [closed]
In C, in the result of the binary &, each bit depends on the two corresponding bits in the operands. If the bit in the same position is set (1) in both operands, it is set in the result. If it is clear (0) in either operand, it is clear in the result. For example, … Read more
Writing a calculator is not an easy task, as there is more involved: Operator Precedence Grouping Evaluating of expressions Operator Precedence Operator precedence is the grouping of operations, such as performing all multiplication and division before addition and subtraction. A calculator program should handle precedence without parenthesis (grouping). Grouping A more advanced calculator will allow … Read more
The language specification defines the syntax, and doesn’t care what you call the parts that make up the language. In abc->def, the first operand is abc, and -> is the operator and def is the second operand, but it is restricted to an identifier is the name of a member of the structure or union … Read more
Solution: I put all of the conditional statements inside of if (!allCorrect[i]) so it looks like this if (!allCorrect[i]) { if (int.TryParse(parameters[i], out INT)) { if (_command.ParameterTypes[i] == EVariableType.INT) { allCorrect[i] = true; } else { allCorrect[i] = false; } } } if (!allCorrect[i]) { if (float.TryParse(parameters[i], out FLOAT)) { if (_command.ParameterTypes[i] == EVariableType.FLOAT) { … Read more
A correct program can look for example the following way #include <iostream> int main() { int num, a = 15; num = ( —-a )–; std::cout << num << std::endl; std::cout << a << std::endl; return 0; } Its output is 13 12 The post-decrement operator has a higher priority than the pre-decrement operator and … Read more
Check Output you can understand every steps and what’s happening in every step using System; class MainClass { public static void Main (string[] args) { Console.WriteLine(“Please enter a number: “); int number = Convert.ToInt32(Console.ReadLine()); int sum = 0; while (number> 0) { Console.WriteLine(“Steps”); Console.WriteLine(“————–“); Console.WriteLine(“Digits: “+ (number % 10)); sum = sum + (number % … Read more
I’m only writing this because the other answers are dangerously wrong. Here is a simple, slow and fool-proof solution: #include <iostream> #include<cmath> int getDigit(int num, int index) { // first shift index -1 digits to the right to position the indexth digit while(–index) { num /= 10; } // now strip off everything after the … Read more
If you need to trigger a function call on assignment, you can wrap the type in a class that overrides the assignment operator; note that you may want to override more than just assignment, this is just an example and not a style guide 🙂 #include <iostream> template<class T> class wrap { private: T value; … Read more
You can’t just concatenate an operator to a couple of numbers and expect it to be evaluated. You could use eval to evaluate the final string. answer = eval(str(randomnumberforq) + operator[randomoperator] + str(randomnumberforq)) A better way to accomplish what you’re attempting is to use the functions found in the operator module. By assigning the functions … Read more
It’s mentioned in Spec: Arithmetic operators: &^ bit clear (AND NOT) So it computes the AND connection of the first operand and the negated value of the second operand. Its name “bit clear” comes from what it does. Examined using it on two 1-bit value: if the second operand is 1, it means to “clear”: … Read more
int RTPower = Int32.Parse(powerTextBox.Text); or for decimal values decimal RTPower = Decimal.Parse(powerTextBox.Text); You need to convert the value from a string to an int. Also, I assume you are new to c# – my advice would be to avoid using var and explicitly declare your variables. It will make things clear and easier for you … Read more
Right shift assignment operator: num >>= 1 is the same as num = num >> 1 http://msdn.microsoft.com/en-US/library/23as4533(v=vs.80).aspx solved What does the “>>=” operator mean in C#?
— is a “decrement” operator in Java and many other languages. The reason the compiler doesn’t treat it as two – operators is that there’s a basic rule that the compiler will look for the longest sequence of consecutive characters that forms one of its “separators” or “operators”, as defined here. (> characters are handled … Read more