Converting Bool to Text in C++

Converting bool to text in C++

How about using the C++ language itself?

bool t = true;
bool f = false;
std::cout << std::noboolalpha << t << " == " << std::boolalpha << t << std::endl;        
std::cout << std::noboolalpha << f << " == " << std::boolalpha << f << std::endl;

UPDATE:

If you want more than 4 lines of code without any console output, please go to cppreference.com's page talking about std::boolalpha and std::noboolalpha which shows you the console output and explains more about the API.

Additionally using std::boolalpha will modify the global state of std::cout, you may want to restore the original behavior go here for more info on restoring the state of std::cout.

Convert string to boolean in C#

I know this is not an ideal question to answer but as the OP seems to be a beginner, I'd love to share some basic knowledge with him... Hope everybody understands

OP, you can convert a string to type Boolean by using any of the methods stated below:

 string sample = "True";
 bool myBool = bool.Parse(sample);

 // Or

 bool myBool = Convert.ToBoolean(sample);

bool.Parse expects one parameter which in this case is sample, .ToBoolean also expects one parameter.

You can use TryParse which is the same as Parse but it doesn't throw any exception :)

string sample = "false";
Boolean myBool;

if (Boolean.TryParse(sample , out myBool))
{
    // Do Something
}

Please note that you cannot convert any type of string to type Boolean because the value of a Boolean can only be True or False

Hope you understand :)

Boolean to String and combining boolalpha with a method instead of having to type it separately when printing

std::string s = isEqual(3,3) ? "true" : "false";

also: you should in isEqual not compare with 0 but with a small value like <0.00001

How to convert string expression to boolean in c++?

In C++, you can utilize lambda functions to achieve something similar:

#include <iostream>

using CmpFunc = bool(float, float);

CmpFunc* condition(char op) {
  switch (op) {
    case '>':
      return [](float a, float b) { return a > b; };
    case '<':
      return [](float a, float b) { return a < b; };
    case '=':
      return [](float a, float b) { return a == b; };
    default:
      return [](float a, float b) { return false; };
  }
}

int main() {
  auto const cmp = condition('>');
  if (cmp(7, 6)) {
    std::cout << "a > b";
  }
}

What is the printf format specifier for bool?

There is no format specifier for bool types. However, since any integral type shorter than int is promoted to int when passed down to printf()'s variadic arguments, you can use %d:

bool x = true;
printf("%d\n", x); // prints 1

But why not:

printf(x ? "true" : "false");

or, better:

printf("%s", x ? "true" : "false");

or, even better:

fputs(x ? "true" : "false", stdout);

instead?

What's the easiest way to convert from a bool to string in C#?

The bool.ToString method already does what you want.

This method returns the constants "True" or "False".

However in practice it is not that often that you need to explicitly call ToString directly from your code. If you are already writing a string then the easiest way is to use concatenation:

string message = "The result is " + b;

This compiles to a call to string.Concat and this calls the ToString method for you.

In some situations it can be useful to use String.Format, and again the ToString method is called for you:

string message = string.Format("The result is {0}. Try again?", b);

How can I convert bool true or false to string True or False

The Boolean structure has a ToString() method. So:

bool b = true;
Console.WriteLine(b.ToString());

How to convert a bool to a string in Go?

use the strconv package

docs

strconv.FormatBool(v)

func FormatBool(b bool) string FormatBool returns "true" or "false"

according to the value of b

Convert bool to QString

You can use the static QString::number method - the bool will be implicitly cast to int to match the integer form of the static factory method, which returns a QString containing 0 or 1.

bool test = true;
QString s = QString::number(test);

Convert boolean to text

The cell you want to say TRUE or FALSE should have this in it:

    =IF(ISNUMBER(FIND("1",A1)),"TRUE","FALSE")

If the cell "A1" has a 1 in it, put TRUE... otherwise FALSE

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