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How to declare a variable of bool datatype in C running on Linux platform. I tried the following but its giving an error:
#include<stdio.h>
#include<string.h>
bool factors[1000]
void main()
{
}
877
Syntax to Declare Boolean Data Types in C:To declare a boolean data type in C we have to use a keyword named bool followed by a variable name. bool var_name; Here, bool is the keyword denoting the data-type and var_name is the variable name. A bool takes in real 1 bit, as we need only 2 different values(0 or 1).
bool is just a macro that expands to _Bool . You can use _Bool with no #include very much like you can use int or double ; it is a C99 keyword. The macro is defined in <stdbool. h> along with 3 other macros.
In C, Boolean is a data type that contains two types of values, i.e., 0 and 1. Basically, the bool type value represents two types of behavior, either true or false. Here, '0' represents false value, while '1' represents true value. In C Boolean, '0' is stored as 0, and another integer is stored as 1.
The C programming language, as of C99, supports Boolean arithmetic with the built-in type _Bool (see _Bool). When the header <stdbool. h> is included, the Boolean type is also accessible as bool .
You simply need #include <stdbool.h>.
57
C doesn't have a bool type. You could use int instead, using 0 for false and 1 for true.
5
If a type is not defined in your environment, you can define own types, also bool, e.g.
typedef enum {false,true} bool;
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