C programming notes PDF

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j.k raut...

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C programming notes C programming notes in chapter 1--- basic concept of 'c' language

1.#include #-- Pre-processor Include-- pre-processor command Stdio-- standard input output (full form) .h-- header file extension 2.#include #-- Pre-processor Include-- pre-processor command Conio-- console input output(full form) .h-- header file extension 3. What is Programming? Ans. Computer programming is a medium for us to communicate with computers. Just like we use hindi or english to communicate with each other programming is a way for us to deliver our instruction to the computer. 4. What is 'c' ? ans. 'c' is a programming language . 'c' is one of the oldest and finest programming language. 'c' was developed from ALGOL, BCPL,and B by DENNIS RITCHIE at AT&T'S BELL Laboratories, in 1972. 5. Uses of c. ans: C language is used to program a wide variety of system some of the uses of c are as follows: 1. Major parts of windows, linux and other operating system are written in c. 2. c is used to write driver programs for devices like tablets, printers etc.

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3. C language is used to program embedded system where programs need to run faster limited memory .

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4. C is used to develop games an area where latency is very important .ic.computer has react quickly on user input.

calculate swapping value without third variable #include

void main() { int a,b;//a=10,b=20 printf("enter value of a="); scanf("%d",&a);

printf("enter value of b="); scanf("%d",&b);

a=a+b;//a=10+20=30 b=a-b;//b=30-20=10 a=a-b;//a=30-10=20

printf("swapping value is="); printf("a=%d b=%d",a,b);

} INPUT---

OUTPUT---

calculate days and months in c program

#include void main() { int days, months; printf("enter days:\n"); scanf("%d",&days);

months=days/30; days=days%30; printf("months=%d,days=%d",months,days);

} input-

output-...