0x01. C - Variables, if, else, while

This program will assign a random number to the variable n each time it is executed. Complete the source code in order to print whether the number stored in the variable n is positive or negative.

• Source Code

  #include <stdlib.h> #include <time.h> /* more headers goes there */ /* betty style doc for function main goes there */ int main(void) { int n; srand(time(0)); n = rand() - RAND_MAX / 2; /* your code goes there */ return (0); }

• The variable n will store a different value every time you will run this program

• You don’t have to understand what rand, srand, RAND_MAX do. Please do not touch this code

• The output of the program should be:

• The number, followed by

  • If the number is greater than 0: is positive

  • If the number is 0: is zero

  • If the number is less than 0: is negative

  followed by a new line

This program will assign a random number to the variable n each time it is executed. Complete the source code in order to print the last digit of the number stored in the variable n.

• Source Code

  #include <stdlib.h> #include <time.h> /* more headers goes there */ /* betty style doc for function main goes there */ int main(void) { int n; srand(time(0)); n = rand() - RAND_MAX / 2; /* your code goes there */ return (0); }

• The variable n will store a different value every time you run this program

• You don’t have to understand what rand, srand, RAND_MAX do. Please do not touch this code

• The output of the program should be:

  • The string Last digit of ,followed by

  • n ,followed by

  • the string is ,followed by

    • If the last digit of n is greater than: the string and is greater than 5

    • If the last digit of n is 0: and is 0

    • If the last digit of n is less than 6 and not 0: the string and is less than 6 and not 0

    followed by a new line

Write a program that prints the alphabet in lowercase, followed by a new line.

• You can only use the putchar function (every other function (printf, puts, etc..) is forbidden

• All your code should be in the main function

• You can only use putchar twice in your code

Write a program that prints the alphabet in lowercase, and then in uppercase, followed by a new line.

• You can only use the putchar function (every other function (printf, puts, etc..) is forbidden

• All your code should be in the main function

• You can only use putchar three times in your code

Write a program that prints the alphabet in lowercase, followed by a new line.

• Print all the letters except q and e

• You can only use the putchar function (every other function (printf, puts, etc..) is forbidden

• All your code should be in the main function

• You can only use putchar twice in your code

Write a program that prints all single digit numbers of base 10 from 0, followed by a new line.

• All your code should be in the main function

Write a program that prints all single digit numbers of base 10 starting from 0, followed by a new line.

• You are not allowed to use any variable of type char

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• You can only use putchar twice in your code

• All your code should be in the main function

Write a program that prints the lowercase alphabet in reverse, followed by a new line

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• All your code should be in the main function

• You can only use putchar twice in your code

Write a program that prints all the numbers of base 16 in lowercase, followed by a new line

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• All your code should be in the main function

• You can only use putchar three times in your code

Write a program that prints all possible combinations of single-digit numbers

• Numbers must be separated ,, followed by a space

• Numbers should be printed in ascending order

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• All your code should be in the main function

• You can only use putchar four times maximum in your code

• You are not allowed to use any variable of type char

Write a program that prints all possible different combinations of two digits

• Numbers must be separated ,, followed by a space

• The two digits must be different

• 01 and 10 are considered the same combination of the digits 0 and 1

• Print only the smallest combination of the two digits

• Numbers should be printed in ascending order, with two digits

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• You can only use putchar five times maximum in your code

• You are not allowed to use any variable of type char

• All your code should be in the main function

Write a program that prints all possible different combinations of three digits

• Numbers must be separated ,, followed by a space

• The three digits must be different

• 012, 120, 102, 021, 201, 210 are considered the same combination of three digits 0, 1, 2

• Print only the smallest combination of the three digits

• Numbers should be printed in ascending order, with three digits

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• You can only use putchar six times maximum in your code

• You are not allowed to use any variable of type char

• All your code should be in the main function

Write a program that prints all possible combinations of two-two-digit numbers.

• The numbers should range form 0 to 99

• The two numbers should be separated by a space

• All numbers should be printed with two digits. 1 should be printed as 01

• The combination of numbers must be separated by comma, followed by a space

• The combinations of numbers should be printed in ascending order

• 00 01 and 01 00 are considered the same combination of the numbers 0 and 1

• You can only use the putchar function (every other function (printf, puts, etc…) is forbidden)

• You can only use putchar eight times maximum in your code

• You are not allowed to use any variable of type char

• All your code should be in the main function

GitHub repository: alx-low_level_programming

Directory: 0x01-variables_if_else_while

File: 0-positive_or_negative.c 1-last_digit.c 2-print_alphabet.c 3-print_alphabets.c 4-print_alphabet.c 5-print_numbers.c 6-print_numberz.c 7-print_tebahpla.c- 8-print_base16.c- 9-print_comb.c 100-print_comb3.c 101-print_comb4.c 102-print_comb5.c