1.Write a C program to find maximum between two numbers. 2.Write a C program to find maximum between three numbers. 3.Write a C program to check whether a number is negative, positive or zero. 4.Write a C program to check whether a number is divisible by 5 and 11 or not. 5.Write a C program to check whether a number is even or odd. 6.Write a C program to check whether a year is leap year or not. 7.Write a C program to check whether a character is alphabet or not. 8.Write a C program to input any alphabet and check whether it is vowel or consonant. 9.Write a C program to input any character and check whether it is alphabet, digit or special character. 10.Write a C program to check whether a character is uppercase or lowercase alphabet. 11.Write a C program to input week number and print week day. 12.Write a C program to input month number and print number of days in that month. 13.Write a C program to count total number of notes in given amount. 14.Write a C program to input angles of a triangle and check whether triangle is valid or not. 15.Write a C program to input all sides of a triangle and check whether triangle is valid or not. 16.Write a C program to check whether the triangle is equilateral, isosceles or scalene triangle. 17.Write a C program to find all roots of a quadratic equation. 18.Write a C program to calculate profit or loss. 19.Write a C program to input marks of five subjects Physics, Chemistry, Biology, Mathematics and Computer. Calculate percentage and grade according to following: Percentage >= 90% : Grade A Percentage >= 80% : Grade B Percentage >= 70% : Grade C Percentage >= 60% : Grade D Percentage >= 40% : Grade E Percentage < 40% : Grade F 20.Write a C program to input basic salary of an employee and calculate its Gross salary according to following: Basic Salary <= 10000 : HRA = 20%, DA = 80% Basic Salary <= 20000 : HRA = 25%, DA = 90% Basic Salary > 20000 : HRA = 30%, DA = 95% 21.Write a C program to input electricity unit charges and calculate total electricity bill according to the given condition: For first 50 units Rs. 0.50/unit For next 100 units Rs. 0.75/unit For next 100 units Rs. 1.20/unit For unit above 250 Rs. 1.50/unit An additional surcharge of 20% is added to the bill