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How do declare function pointer having two integer parameters and returning integer pointers?
// declare a function int* function(int, int); or int* (function)(int, int); // declare a pointer to a function int* (*pointer_to_function)(int, int);
What is the difference between function and recursive function?
I will explain in the easiest way the difference between the function and recursive function in C language. Simple Answer is argument of the function is differ but in the recursive function it is same:) Explanation: Function int function(int,int)// function declaration main() { int n; ...... ...... n=function(a,b); } int function(int c,int d) { ...... ...... ...... } recursive Function: int recursive(int,int)// recursive Function declaration main() { int n; ..... ..... ..... ..... n=recursive(a,b); } int recursive(int a,int b) { ..... .... .... .... } Carefully see, In the recursive Function the function arguments are same.
What is style of function is not obsolete in c language?
Old: function (par1, par2) int par1; char *par2; {...} New: int function (int par1, char *par2) {...}
What is a prototype within a program?
Prototyping is done (at least in C/C++) to declare a function and tell the compiler how to use it before the int main(void) part of the program is run. The function is declared after main and is usually done as a style thing. example int function(int); int main(void) { int anumber = 1; x = function(anumber); return 0; } int function(int number) { //do something return number; } et cetera et cetera...
How is main function declared?
int main (void) or int main(int a, char **p)
How will you declare an array of three function pointers where each function receives two int and returns float?
typedef float (*pt_func)(int, int); pt_func arr[3];another way:float (*pt_func[3])(int, int);
Is int a statistical function?
No, 'int' is short for 'integer' (or 'integral' etc).
What is the difference between a function pointer and a pointer to a function?
A pointer to a function is the memory address that stores the address of a function, while the pointer itself is a function pointer.A pointer to a function might be defined as "int (*pf)(int, int);", while to actually point to the function, you would use a function pointer, such as "pf = &func;".
What does the C statement int open parenthesis asterisk f close parenthesis open parenthesis int asterisk close parenthesis declare?
The declaration int (*f) (int*); declares a function pointer named f. The function pointer can be assigned the address of any function that accepts a pointer to int and returns an int. Function pointers can be used to pass functions to functions. Normally we use typedefs to simplify the notation of function pointers: typedef int (*f) (int*); int x (int*); int y (int*); f fp; // declare a function pointer of type f int z = 42; fp = x; // point to the x function fp (&z); // invoke function via pointer fp = y; // point to the y function fp (&z); // invoke function via pointer. A typical usage of function pointers is to provide a predicate for a comparison sort algorithm. This makes it possible for the same sorting algorithm to compare objects using different predicates. For example: typedef bool (*pred) (int, int); // function pointer type named pred void sort (int a[], size_t len, pred func) { // simple shell sort for(int i=len/2; i>0; i=i/2) { for(int j=i; j<len; j++) { for(k=j-i; k>=0; k=k-i) { if( !func (a[k+i], a[k]) // invoke the predicate function { swap (a[k], a[k+i]); } } } } } // Declare predicates... bool less_than (int a, int b) { return a<b); bool greater_than (int a, int b) { return a>b; } int main () { int x[] = {3,5,2,4,1}; sort (x, 5, less_than); // sort array of 5 elements in ascending order sort (x, 5, greater_than); // sort array of 5 elements in descending order return 0; }
What are the applications of void data types inc plus plus?
void data type is used in function declaration. It can be explained by examle void add(int,int); this will tell the compiler that no value is going to be returned by the function. int add(int,int); this indicates that an integer type value will be returned by the function
Write a function in c that returns the largest value stored in an array-of-int Test the function in a simple program?
int max(int arr[], int arrSize){int maximum = arr[0];for (int i = 0; i < arrSize; i++){if (maximum < arr[i]){maximum = arr;}}return maximum;}
When is a function executed and where should a function prototype and function definition appear in a source program?
If you want to use prototype it has to be declared before main(). If you have a function of type double with one argument of type int (with name arg), and the function name is func, then we have:#include ...double func(int arg);...int main(...){...return 0;}...double func(int arg){...}
