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Void means there is no data type. So if you have a void function it does not return a value (and attempting to do so will cause an error) whereas a non-void function (ex. int, long, String, bool, etc) will return a value of that type.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoStrictly speaking a void routine is not a function, since a function must return a value. Therefore, a void routine is a subroutine that does not return a value as its name, and can be called standalone.
For example, a void routine to add two numbers together and place the value in a third could be called as:
void Sum (int one, int two, int * three) ;
and could be called as:
Sum (firstVal, secondVal, &thirdVal) ;
Wiki User
∙ 10y agoVoid has two purposes: when used as the formal return value of a function, it simply means that the function returns no value, not even zero. But when used to specify a void pointer type (void*), it simply means that the pointer is of unknown type. It is up to the caller to decide the actual type. However C++ is more strict than C with regards to type-safety, thus the return value of the C-style malloc function must be explicitly cast to the appropriate type. In C, the return value need not be explicitly cast, which could lead to errors if you later cast the void pointer to the wrong type.
Wiki User
∙ 13y agovoid means nothing and it does exactly that.. for example...
the function declaration:
void function_name(int)
tells c compiler that the user defined function named function_name will take an integer as an argument and after completion of task would return nothing...
Wiki User
∙ 13y agovoid means that the function you are trying to use or/and define does not return arguments.
Wiki User
∙ 6y agoA void function is simply a function that returns no value.
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Difference between void and devoid in c plus plus?
There is no such thing as devoid in C++.
How do you use call by reference in c plus plus?
Call by reference means calling a function using a reference to a variable or a pointer. You call a function by passing refrences to a variable. For eg: void x(int &a) { a=2; } void main() { int s=3; x(s); } OR void a(int &c) { c=5;}void main(){ int *p; *p=2a(*p);}
Which function reads character into an array specified bt its parameter in c plus plus?
void foo (char& c) { cin >> c; } int main() { char ch[10] {}; for (size_t c=0; c!=10; ++c) foo (c[0]); }
Purpose of void database in c plus plus?
There is no such term in C++. You probably meant void datatype. Void simply means "no type" and is primarily used as a place-holder for functions that do not return a value, since all functions must return something even when they return nothing at all. Not to be confused with void* which is a pointer to any type which, if non-null, must be cast to the correct type before being dereferenced.
What is the default return type in C and C plus plus?
No. There is no default return type for functions, it must be explicitly specified in both the function declaration and in the definition. To specify no return value, return void. To return a variant type, return void* (pointer to void). Otherwise return the exact type.
How does the use of the 'void' keyword differ in C plus plus vs. C?
It doesn't. Void has the same meaning in both.
Difference between void and devoid in c plus plus?
There is no such thing as devoid in C++.
What use of void data type in c plus plus?
doesn't return the value.
Which Program that will run in C but not in C plus plus?
void main() { int *x = malloc(sizeof(int) * 10); }
C plus plus program that will count?
#include int main (void) { puts ("1 2 3"); }
How do you use call by reference in c plus plus?
Call by reference means calling a function using a reference to a variable or a pointer. You call a function by passing refrences to a variable. For eg: void x(int &a) { a=2; } void main() { int s=3; x(s); } OR void a(int &c) { c=5;}void main(){ int *p; *p=2a(*p);}
Show the simple c plus plus program?
int main (void) { puts ("Hello, world"); return 0; }
How do you check Address of integer in c plus plus?
void myfun (int *pi){if (i==NULL) printf ("check failed");}
What is CPU usage small programm c plus plus?
Example: int main (void) { LOOP: goto LOOP; }
How to swap two numbers by call by reference in c plus plus?
void swap(int& a, int& b ) { a^=b^=a^=b; }
How do you rectify the waring is function should return a value in turbo c plus plus?
By returning a value. Or using type 'void'.
Any program in c plus plus without using any header file?
For example: int main (void) { return 0; }
