C Programming.

1. Computer Programming 2. History of Prog.Language 3. Introduction to C 4. Features of C 5. Starting Turbo C 6. C Tokens 7. Basic requirement of C 8. Comments 9. My First Program in C 10. Line Break 11. C Escape Sequence 12. Constants or Literals 13. Variables in C 14. Data Types in C 15. Range of Data Types in C 16. Declare Variables 17. Reserved Key Words 18. printf( ) statement 19. Chained & Embedded state 20. Prog.to print sum of 2 nos 21. scanf( ) stament 22. print sum & average 23. print Area of Rectangle 24. Area & Circumference of Circle 25. Prg.for Simple Calculator 26. Operators in C 27. Ex. Of Operators 28. Swap two numbers 29. Hierarchy of Operators 30. if( ) statement 31. Prg.to check +ve,-ve or zero 32. if..else statement 33. Prg.to check Odd or Even 34. Prg.to print larger of 2 nos 35. Prg.to print largest of 3 nos 36. Prg.to check divisibility 37. Prg.to check print range 38. for. . . loop statement 39. prg.to print series of nos 40. Prg.to check divisibility 41. prg.to print sum of nos 42. Prg.to print Pyramid 43. prg.for Factorial 44. prg.to fill screen 45. prg.for largest/smallest no 46. prg.to print reverse no 47. prg.to add each digit 48. prg.for sum of factorial 49. prg.for fibonacci series 50. prg.to check Prime nos 51. prg. Prime no from 1 to 100 52. prg.Specified Prime nos 53. while( ) statement 54. do. . While statement 55. goto statement 56. break & continue state. 57. switch case statement 58. Array in C 59. Reverse order using array 60. Ascending/Descending order 61. prg.to search no in Array 62. Double Dimension Array 63. String in C 64. String with spaces in C 65. Print string in reverse 66. prg.to count A,E,I,O,U vowel 67. Function( ) in C 68. Function program examples 69. General Purpose Programs 70. Loan & EMI calculation prg. 71. Table print prg. 72. Leap year program 73. lower to UPPER case prg. 74. Frequency Distribution prg. 75. Bank note calculation prg. 76. Simple Interest prg. 77. Compound Interest prg. 78. Simple Depreciation prg. 79. Reducing bal.Depreciation 80. Marksheet prg. 81. Income Tax prg. 82. Time calculator prg. 83. Distance converter prg. 84. Volume Air Calculation 85. Time to fill Water Tank 86. Salary Calculation prg. 87. Total Sale Calculation prg. 88. Male/Female percentage prg. 89. Library Rent prg. 90. Office Expance prg. 91. Total Salary Calculation prg. 92. Profit or Loss prg. 93. Total Profit/Loss prg. 94. Convert Amt to Word. 95. ASCII Table 96. C Operators 97. C & C++ Reserved Keyword 98. C & C++ Pre-Define Function 99. C Interview Part1 100. C Interview Part2 101. C Interview Part3 102. C Interview Part4 103. C Interview Part5 104. C Interview Part6 105. C Interview Part7 106. C Interview Part8 107. C Interview Part9 108. C Interview Part10 109. C Interview Part11
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Basic Requirment of C Program tutorials

# include <stdio.h>

  • The first line of all C program is #include <stdio.h>

  • It look’s like a program statement but it is not. It is not a part of the function body and doesn’t end with a semicolon.

  • Instead, it starts with a sign # , It is called a preprocessor directives.

  • A preprocessor directive is an instruction to the compiler, to include another file into our source file.

  • In effect, the #include directive is replaced, by the contents of the file specified.

  • The preprocessor directive #include tells the compiler, to add the stdio.h (Standard Input / Output header file) to current program before compiling.

  • C is very small language and it can do nothing without use of external libraries

  • The stdio.h header library contains code, that allows you to read and write data from and to the monitor.

# include <header file>

  • Apart from stdio.h file, some function needs other header files. So if you use those functions, you need to include appropriate header files.

  • Functions like pow(), log(), acos(), atan() require <math.h> header file.

  • Functions like strcmp(), strcpy(), strlen() require <string.h> header file.


  • Functions are one of the fundamental building blocks of C.

  • The entire C code runs inside functions.

  • The parentheses following the word main() are distinguishing features of function.

  • The word void preceeding the function name indicates that this particular function does not have a return value.

  • Braces {}: The body of function is surrounded by braces sometimes you may even call them curly brackets.

  • They surround or delimit a block of program statement.

  • Every function must use this pair of braces, this braces{} indicates begin and end of the function.



  • main() is the most imporatant function of any C prorgram.

  • The first statement executed will be at the beginning of function called main().

  • If there is no function called main() in the program, while linking program, C will gives an error.

  • If you rename main() function with some thing else like newmain() function, and if you compile this program it will compile successfully, but when you run the program it will give runtime linker error as undefined symbol _main in library file.

  • If main() function does not return any value, then we need to type it as void main().

  • If we write only main() then the default return type of the function main() is int. In this case you need to write return 0; at the end of your C program.


Semicolon (;)

  • At the end of each C program statement there must be a ; (semicolon).

  • However semicolon should not be written after function name,iteration logic,control logic.

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