1. C Programming

2. printf int printf ( const char * format,... ); printf ("Characters: %c \n", 'a'); printf ("Decimals: %d %f\n", 1977, 3.14); specifierOutputExample cCharactera d or i Signed decimal integer392 sString of characterssample uUnsigned decimal integer7235 f Decimal floating point392.65

3. Printf - float %f – floating point. Displays upto 6 decimal places. %0.2f- displays 2 decimal places %5.1f- displays 4 digits including one after decimal point. If less digits are there then it gives spaces instead %05.1f- displays 4 digits including one after decimal point. If less digits are there then it gives leading zeros.

4. Printf – decimal %5d- displays a the value. If number of digits is less than 5 then leading spaces are given. %-5d- here trailing spaces are given. %05d- here instead of spaces zeros are given.

5. Scanf Reads data from standard input and stores them according to the parameter format into the locations pointed by the additional arguments. Eg: - int i; scanf ("%d",&i); typeQualifying Input cSingle character: Reads the next character. dDecimal integer: Number optionally preceded with a + or - sign. e, E, f, g, G Floating point: Decimal number containing a decimal point, optionally preceded by a + or - sign and optionally folowed by the e or E character and a decimal number. Two examples of valid entries are -732.103 and 7.12e4 s String of characters. This will read subsequent characters until a whitespace is found (whitespace characters are considered to be blank, newline and tab). uUnsigned decimal integer.

6. Coding standards Variable – Each variable must strictly be named in a meaningful way – only one declaration of one variable in one line – Eg: -int total_marks; int totalmarks; File Name – Filenames should be all lowercase and can include underscores (_) or dashes – Eg:- helloworld.c or hello_world.c

7. Coding standards Comments – Meaningful comments and should be proper sentences – No spelling mistakes in comments Indenting – Two spaces should be used. Line length – Max 80 characters per line

8. Question 1 Swap two variables using a temporary variable. Input – Enter integer value 1- 10 – Enter integer value 2- 20 Output – Value 1= 10 – Value 2= 20 – After Swapping – Value 1= 20 – Value 2= 10

9. Question 2 Compute volume of a cylinder Input – Enter the radius of cylinder (float) – Enter height of cylinder in float Output – Volume of the cylinder(round off to 2 decimal places) =