Skip to main content

Defining your own types


C allows you to define your own types, and this can make your codes much more legible.
For example, you can define a type called price that you can use to define variables that
you use to represent the price of certain objects. To do so, you would use

 typedef float price;
int main(void) {
price x, y;
}

 The typedef is used in the following way:
typedef existing_type new_type;
The price type example is identical to using
float x, y;

 but it is useful to use typedef when you would like the ability to change the types of certain
variables throughout your codes by only changing one line. That is, if you wanted to change
all of your prices to type double, then you would only need to change the typedef line to
typedef double price;
Labels:

Popular posts from this blog

Putimage function in c

putimage function outputs a bit image onto the screen. Declaration:- void putimage(int left, int top, void *ptr, int op); putimage puts the bit image previously saved with getimage back onto the screen, with the upper left corner of the image placed at (left, top). ptr points to the area in memory where the source image is stored. The op argument specifies a operator that controls how the color for each destination pixel on screen is computed, based on pixel already on screen and the corresponding source pixel in memory. c smiling face animation This animation using c draws a smiling face which appears at random position on screen. See output below the code, it will help you in understanding the code easily. C programming code #include<graphics.h> #include<conio.h> #include<stdlib.h>   main() { int gd = DETECT, gm, area, temp1, temp2, left = 25, top = 75; void *p;   initgraph(&gd,&gm,"C:\\TC\\BGI");   setcolor(YELLOW)...
Read more

C++ Program to find the sum, difference, product and quotient of two integers

#include <iostream.h> #include <conio.h> void main() {   clrscr();   int x = 10;   int y = 2;   int sum, difference, product, quotient;   sum = x + y;   difference = x - y;   product = x * y;   quotient = x / y;   cout << "The sum of " << x << " & " << y << " is " << sum << "." << endl;   cout << "The difference of " << x << " & " << "y <<  is " << difference << "." << endl;   cout << "The product of " << x << " & " << y << " is " << product << "." << endl;   cout << "The quotient of " << x << " & " << y << " is " << quotient << "." << endl;   getch(); }
Read more

What is iostream.h in C++ Programing Language ?

In C++ programing language, all header files end with .H extension. In standard C++, all devices are accessed and used as a file.  One such header file is iostream.h in C++ programming language. In this, all input and output devices are treated as files.  Let's quickly look at what are the input and output devices mean in C++ program.  Standard Input Device - Keyboard  Standard Output Device   - Monitor  Standard Error Device - Screen or monitor In C++, input and output are not defined within, and are implemented with the help of a component of the C++ standard library which is I/O library.  A file is read simply as a stream of bytes at the lowest level. But at a user level, a file consists of possibly mixed data types which can be characters, arithmetic values class, objects etc.  What are the predefined streams in I/O Library? As discussed above there are input, output and error library in c++, they have some predefined streams objects as well w...
Read more