Introduction to C Programming Language.Also introduced some important C programs with Output.

1. 1

2. What is programming?
Input:
A command which is
given by the
programmer
e.g.
We are EEE family
(We want to print out
what we’ve written)
Processing Unit:
 Analysing the command
 Converting input command in
binary data
 Process the binary command
 Converting to aspect result
e.g.
i. We are EEE family = 0101…..
ii. Process 0101……
iii. 0101= We are EEE family
Output:
Result of the process
e.g.
We are EEE family
(Computer’ve printed
out what we had
wanted to write)
2

3. What is compiler?
Compilers we specially require:
• Code-blocks (for c or c++ programming)
• Net-Beans (for Java or Android programming)
3

4. 4
C Symbolic patterns

5. General knowledge of C coding:
CODING:
5
#include <stdio.h>
//include standard input & output numbers
#include <stdlib.h>
//include standard library numbers
int main()
// main function , integer type ,not including any arguments
{
printf(" ");
// means new line
return 0;
//main function doesn’t return any value
}

6. 6
#include <stdio.h>
#include <stdlib.h>
int main()
{
printf(" ");
return 0;
}

7. Data types:
7
Bytes Required:
#include <stdio.h>
#include <stdlib.h>
int main()
{
int a;
float b;
char c;
int s1,s2,s3;
s1=sizeof(a);
s2=sizeof(b);
s3=sizeof(c);
printf ("%d %d %d ",s1,s2,s3);
return 0;
}
 An integer requires 4 bytes
of Memory
 A float requires 4 bytes of
Memory
 A character requires 1 byte
of Memory
 A string requires (x + Null)
bytes . Here x is its total
bytes of characters

8. Some important Functions & Features:
8
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i;
for (i=0;i<10;i++)
{
printf("%dn",i);
}
for (i=9;i>=0;i--)
{
printf("%dn",i);
}
return 0;
}

9. 9
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i=0;
while(i<10)
{
printf("%dn",i);
i++;
}
int y=1;
while(y==1)
{
printf("while function is working n");
printf("Press 1 to continue else any key to close:");
scanf("%d",&y);
}
return 0;
}

10. 10
#include <stdio.h>
#include <stdlib.h>
int main()
{
int i=0;
do
{
printf("%dn",i);
i++;
}
while(i<10);
return 0;
}

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12. Array
12

13. User define function:
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14. User define function:
14

15. Pointer variable:
15

16. C programs 16

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25. 25
int factorial (int a)
{
int i,b=1;
for (i=1;i<=a;i++)
{
b=b*i;
}
return(b);
}

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