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program to find cube of a number using function
/* program to find cube of a number using function
Write a C program to input any number from user and find cube of the given number using function. How to find cube of a given number using function in C programming.
Cube of a number xnum is cube = xnum * xnum * xnum. This is easy, but we need to write a separate function for this simple statement.
First assign a meaningful name to the function, say cube().
The function should accept a number whose cube is to be calculated. Hence, function definition is cube(double xnum).
Finally, the function should return cube of xnum passed. Hence, return type of function should be double.
After observing above points function declaration looks like double cube(double xnum); */
#include <stdio.h>
/* Function declaration */
double cube(double xnum);
int main()
{
int xnum;
double c;
/* Input number to find cube from user */
printf("Enter any number: ");
scanf("%d", &xnum);
c = cube(xnum);
printf("Cube of %d is %.2f", xnum, c);
return 0;
}
/**
* Function to find cube of any number
*/
double cube(double xnum)
{
return (xnum * xnum * xnum);
}
A function is a group of statements that together perform a task. Every C program has at least one function, which is main(), and all the most trivial programs can define additional functions. You can divide up your code into separate functions. How you divide up your code among different functions is up to you, but logically the division is such that each function performs a specific task. A function declaration tells the compiler about a function's name, return type, and parameters. A function definition provides the actual body of the function. The C standard library provides numerous built-in functions that your program can call. For example, strcat() to concatenate two strings, memcpy() to copy one memory location to another location, and many more functions. A function can also be referred as a method or a sub-routine or a procedure, etc.
#include is a way of including a standard or user-defined file in the program and is mostly written at the beginning of any C/C++ program. This directive is read by the preprocessor and orders it to insert the content of a user-defined or system header file into the following program. These files are mainly imported from an outside source into the current program. The process of importing such files that might be system-defined or user-defined is known as File Inclusion. This type of preprocessor directive tells the compiler to include a file in the source code program. Here are the two types of file that can be included using #include:
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