PROJECT PRINTF - HOLBERTON SCHOOL

Jose Vallejo Contreras & Carlos Barros Amador

Synopsis

This is a simple implementation of printf function that formats and prints data

Description

The _printf() function produces output according to a format which is described below. This function write its output to the stdout, the standard output stream. Returns the count of printed characters when the function is successful and -1 when the function fails.

The available convertion specifiers are:

• %c: Prints a single character.
• %s: Prints a string of characters.
• %d: Prints integers.
• %i: Prints integers.
• %b: Prints the binary representation of an unsigned decimal.
• %u: Prints unsigned integers
• %x: Prints the hexadecial representation of an unsigned decimal in lowercase letters
• %X:Prints the hexadecial representation of an unsigned decimal in uppercase letters
• %r: Prints a reversed string
• %R: Prints the Rot13 interpretation of a string

Usage

• All the files are to be compiled on Ubuntu 14.04 LTS with gcc -Wall -Werror -Wextra -pedantic *.c
• Prototype ot the funtion is: int _printf(const char *format, ...);
• Returns: the number of characters printed (excluding the null byte used to end output to strings)
• write output to stdout, the standard output stream
• format is a character string. The format string is composed of zero or more directives. See man 3 printf for more detail. You need to handle the following conversion specifiers:
• It's don’t have to buffer handling of the C library printf function
• It's don’t have to handle the flag characters
• It's don’t have to handle field width
• It's don’t have to handle precision
• It's don’t have to handle the length modifiers

Example program

• FINTION ("ARGUMENTS",...(variatic parameters))

• printf: built-in funtion of C

• _printf: Owner funtion

• printf("=====================\n");

• printf("QAREVIW 3-20-2020\n");

• printf("=====================\n");

• _printf("Let's print a simple sentence.\n");

• printf("Let's print a simple sentence.\n");

• _printf("%c", 'S');

• printf("%c", 'S');

• _printf("A char inside a sentence: %c. Did it work?\n", 'F');

• printf("A char inside a sentence: %c. Did it work?\n", 'F');

• _printf("Let'see if the cast is correctly done: %c. Did it work?\n", 48);

• printf("Let'see if the cast is correctly done: %c. Did it work?\n", 48);

• _printf("%s", "This sentence is retrieved from va_args!\n");

• printf("%s", "This sentence is retrieved from va_args!\n");

• _printf("Complete the sentence: You %s nothing, Jon Snow.\n", "know");

• printf("Complete the sentence: You %s nothing, Jon Snow.\n", "know");

• _printf("Complete the sentence: You %s nothing, Jon Snow.\n", (char *)0);

• printf("Complete the sentence: You %s nothing, Jon Snow.\n", (char *)0);

• _printf("%c%cth %s%s a%cg%s: Y%sou %s no%ching%s Snow.%c", 'W', 'i', "some ", "more", 'r', "s", "", "know", 't', ", Jon", '\n');

• printf("%c%cth %s%s a%cg%s: Y%sou %s no%ching%s Snow.%c", 'W', 'i', "some ", "more", 'r', "s", "", "know", 't', ", Jon", '\n');

• _printf("%%");

• printf("%%");

• _printf("Should print a single percent sign: %%\n");

• printf("Should print a single percent sign: %%\n");

• _printf("%s%c%c%c%s%%%s%c", "Loading ", '.', '.', '.', " 99", " Please wait", '\n');

• printf("%s%c%c%c%s%%%s%c", "Loading ", '.', '.', '.', " 99", " Please wait", '\n');

• _printf("css%ccs%scscscs\n", 'T', "Test");

• printf("css%ccs%scscscs\n", 'T', "Test");

• _printf(NULL);

• printf(NULL);

• _printf("%c", '\0');

• printf("%c", '\0');

• _printf("%");

• printf("%");

• _printf("%!\n");

• printf("%!\n");

• _printf("%K\n");

• printf("%K\n");

• ============================

• QAREVIW 3-20-2020

• ============================

• Let's print a simple sentence.

• Let's print a simple sentence.

• SA char inside a sentence: F. Did it work?

• SA char inside a sentence: F. Did it work?

• Let'see if the cast is correctly done: 0. Did it work?

• Let'see if the cast is correctly done: 0. Did it work?

• This sentence is retrieved from va_args!

• This sentence is retrieved from va_args!

• Complete the sentence: You know nothing, Jon Snow.

• Complete the sentence: You know nothing, Jon Snow.

• Complete the sentence: You (null) nothing, Jon Snow.

• Complete the sentence: You (null) nothing, Jon Snow.

• With some more args: You know nothing, Jon Snow.

• With some more args: You know nothing, Jon Snow.

• %Should print a single percent sign: %

• %Should print a single percent sign: %

• Loading ... 99% Please wait

• Loading ... 99% Please wait

• cssTcsTestcscscs

• cssTcsTestcscscs

• %!

• %!

• %K

• %K

• =====================

• FIN

• =====================

• START OF TEST

• =====================

• printf(NULL) : -1

• _printf(NULL) : -1

• printf("%") : -1

• _printf("%"): -1

• =====================

• CHAR

• =====================

• Expected : a

• Actual : a

• Expected : z

• Actual : z

• Expected : 15

• Actual : 15

• Expected : ac

• Actual : ac

• Expected : 5

• Actual : 5

• Expected : .

• Actual : .

• ok 16, own 17

• Expected : %y

• Actual : %y

• Expected : %

• Actual : %

• =====================

• STRINGS

• =====================

• Expected : holberton

• Actual : holberton

• Expected : $

• Actual : $

• Expected : hello, world

• Actual : hello, world

• Expected : 0

• Actual : 0

• Expected : holbertonschool

• Actual : holbertonschool

• Expected: % %%hello holberton(null)

• Actual: % %%hello holberton(null)

• Expected: 37

• Actual : 37