Basics C language is one of the powerful languages. Below are some of the features of C language. Ø Reliability Ø Portability Ø Flexibility Ø Interactivity Ø Modularity Ø Efficiency and Effectiveness 1) C program to calculate Simple Interest. Given principal (amount), time and interest rate by user, calculate simple interest based on given rate of given time period. 2) Ask the employee details Name initial---(surname only single letter, take datatype as char) Age Salary-(take datatype double) expected expenditure actual expenditure and display name and remaining balance of salary. Operators The symbols which are used to perform logical and mathematical operations in a C program are called C operators. These C operators join individual constants and variables to form expressions. Operators...