Joys of Programming » printf

gcc: Compilation Warning: incompatible implicit declaration of built-in function `printf’

Joys of Programming — Fri, 17 Dec 2010 18:24:53 +0000

The purpose of printf() as described by the man page Let’s make use of printf in a simple program Now compile the program printf.c… You will see the following warnings. This is because we missed to add the headers which declare the function printf() and the supporting types Let’s add the relevant header files (.h) [...]

gcc: Compilation Warning: incompatible implicit declaration of built-in function `printf’

Joys of Programming — Fri, 17 Dec 2010 15:09:49 +0000

C: printing long double using printf

Joys of Programming — Sat, 27 Feb 2010 19:04:03 +0000

If you want to use very large floating numbers in C beyond what can be stored using double, use long double.This is useful for large scale scientific computations Printing a long double is shown here The output of this program As you may have noticed, the size of a long double is 12 bytes. There [...]

C: printing double using printf

Joys of Programming — Sat, 27 Feb 2010 18:54:34 +0000

If you want to use large floating numbers in C, you can use double instead of float. Printing a double is shown here The output of this program The size of a double is 8 bytes. There are three ways by which we printed the double lf corresponding to long float (double) g e: with [...]

C: Printing float using printf

Joys of Programming — Sat, 27 Feb 2010 18:37:14 +0000

float in C is used to represent floating point numbers. It’s declaration is as simple as The following program shows how to print a float. Let’s check the output The output is upto a precision of 6 digits after the decimal point. This is a behavior by default which can be changed

C: Printing unsigned/signed long long int using printf

Joys of Programming — Sat, 27 Feb 2010 18:24:31 +0000

If you want to use large integer numbers which cannot be represented using 4 bytes, you can use long long int instead of int. A long long int occupies 8 bytes. But you can make use of the sizeof operator to find the size of a long long int. Two types of integer are supported [...]

C: Printing unsigned/signed long int using printf

Joys of Programming — Sat, 27 Feb 2010 18:11:59 +0000

If you want to use integer which occupies 4 bytes, you can use long instead of int. Note that such a case is useful in cases where your compiler supports only 2 bytes int. In case of gcc compilers and a normal x86 machine, both int and long int occupy 4 bytes. Two types of [...]

C: Printing unsigned/signed short using printf

Joys of Programming — Sat, 27 Feb 2010 16:51:10 +0000

Two types of integer are supported in C: signed and unsigned integers. If you want to use integer which occupies only 2 bytes, you can use short instead of int. To declare a signed short integer To declare a unsigned short integer If you do not specify a specifier with short, it is taken as [...]

C: Printing unsigned/signed integer using printf

Joys of Programming — Sat, 27 Feb 2010 16:35:23 +0000

Two types of integer are supported in C: signed and unsigned integers. To declare a signed integer To declare a unsigned integer If you do not specify a specifier with int, it is taken as signed integer. To print signed integer, you can either use i or d. For unsigned integer, use u. This is [...]