0x01-variables_if_else_while

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

• 0. - 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.

  You can find the source code here
  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
  

• 1. - 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.

  You can find the source code here
  The variable n will store a different value every time you run this program
  You don’t have to understand what rand, srand, and 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 5: the string and is greater than 5
          if the last digit of n is 0: the string 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
  

• 2. - 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
  

• 3. - 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
  

• 4. - 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
  

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

  All your code should be in the main function
  

• 6. - 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
  

• 7. - 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
  

• 8. - 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
  

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

  Numbers must be separated by ,, 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
  

• 10. - Write a program that prints all possible different combinations of two digits.

  Numbers must be separated by ,, followed by a space
  The two digits must be different
  01 and 10 are considered the same combination of the two digits 0 and 1
  Print only the smallest combination of 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
  

• 11. - Write a program that prints all possible different combinations of three digits.

  Numbers must be separated by ,, followed by a space
  The three digits must be different
  012, 120, 102, 021, 201, 210 are considered the same combination of the three digits 0, 1 and 2
  Print only the smallest combination of 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