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ceil Returns smallest integer not less than the real number passed as argument.

floor Returns largest integer not greater than the real number passed as argument.

So the file must be included in the program that uses these functions.

gets() This function accepts a string of characters entered by the keyboard.

Data types: Data types are the means to identify the type of data and associated operations of handling it.

C offers two types of data types: Fundamental data types.

These header files provide function prototypes, definitions for library functions.

puts(name); get() The function get() fetches a single character and stores it in a character variable.

These are the data types that are not composed of any other data type.

There are five fundamental data type: char, int, float, double and void. These are the data types that are composed of fundamental data types.

XII Computer Science STUDY MATERIAL “COMPUTER SCIENCE (083)” Class – XII Session: 2010-2011 CONTENTS Topic Page No Unit 1: Programming in C 5-93 1.1 C Revision Tour 5 – 36 1.2 Object Oriented Programming 37 – 41 1.3 Function Overloading 42 – 43 1.4 Classes And Objects 44 – 51 1.5 Constructors And Destructors 52 – 59 1.6 Inheritance: Extending Classes 60 – 69 1.7 Data File Handling 70 – 86 1.8 Pointers 87 -93 Unit 2: Data Structures 94 – 128 2.1 Arrays 94 – 106 2.2 Stack 107 – 119 2.3 Queue 120 – 128 Unit 3: Database and SQL 129 – 144 3.1 Database Concepts 129 – 134 3.2 Structured Query Language 135 – 144 Unit 4: Boolean Algebra 145 – 163 Unit 5: Communication & Open Source Concepts 164 – 173 HOTS Questions 174 -184 Sample Papers 185 – 195 Marking Scheme/ Solution 196 – 205 Practice Papers 206 – 242 Action Plan 243 – 245 Steps For Quantitative & Qualitative Improvement Of The Result 246 Difficulties Faced By Teachers & Suggestions 247 1.1: C Revision Tour POINTS TO FOCUS C Character Sets: Character set is a set of valid characters that the language can recognize.

Letters A-Z , a-z Digits 0-9 Special Symbols Space – * / ^ \ ( ) [ ] = !