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C-Language Programs
Introduction to C- Programming
C- Programming is a language which is used to develop compiler for softwares like java compiler and . net compiler.
C- programming first introduced by dennis ritchie.
C- programming is basic language which help us to develop different softwares.
General syntax for C programming which is used C-Language Programs
Before we see the detail programming for C we have to know the basic syntax of C programming if we understand syntax of C it help us to solve the all program which we run in future.
In C-Language Programs basic syntax is as follow:-
Header file
int main()
{
variable declaration;
statement;
return 0;
}
Now, we see each property meaning which mention in the above syntax.
Header file
Header file contains the set of functions and this functions complete there related tasks.Header files are very important to declare in C-Language Programs.
Header file basically used to give the instructions to compiler to complete there task one by one
In C- programming some header files are pre defined.
Following are some pre defined header files.
1) # include <stdio.h>
2) # include <conio.h>
3) # include <string.h>
As per project requirement we also defined the header files which we called user defined header files.
4) # include <dmart.h>
Header file contains different set of functions and that functions perform there particular task in project.
1) # include <stdio.h>
This header file contains following functions.
a) printf()
printf() function is defined in # include <stdio.h> which is used to display message on screen.
b) scanf()
scanf() function is defined in # include <stdio.h> which is used to read or take value from user.
2) # include <conio.h>
This header file define following functions.
a) getch()
getch() function is defined in # include <conio.h> this is used to get character from source code and hold screen to display the output.
b) clrscr()
clrscr() function is defined in # include <conio.h> it is help to clear screen from previous output.
3)int main ();
it is function which is used to perform specific operation.
the main does not return any value so we have to use int/ void before the main function.
4)Variable Declaration
it is used to store the value.
eg. int a=40;
here is a variable and value flow from this variable from right to left 40 store in 'a' variable.
flow per =88.99;
Types of Variables
a)Global variable
b)Local variable
a)Global variable
Such variable value will be accessible through out the program ( will work with in all function) Hence scope (working area ) is unlimited of global variables.
b)Local variable
Such variable value will be accessible only within function hence scope ( working area) is limited of local variable.
Note:- Return 0
the main function does not return any value, so we have to used return zero at the end of main function.
Operators in C programming which help in C-Language Programs.
1) Arithmetic Operator
a) + pulse operator
b) - minus operator
c) * star operator
d) % mod operator
e) / division
2)Relation operator/conditional operator
a) > - greater than
b) < - Less than
c) >= -greater than equal to
d) <= -less than equal to
e) == -equal to equal to
3)Logical operator
a) && - and operator.
b) // - or operator.
c) ! - not operator.
4)Incremental and decrement operator
a) post increment a ++
b) pre increment ++a
c) post decrement a--
d) pre decrement --a
Program 1.C (First save the file )
# include<stdio.h>
int main ()
{
printf(" \n welcome to India");
printf("\n welcome to Pune");
return 0;
}
o/p-welcome to india
welcome to pune
Note- C-Language Programs \n is used to print output in one by one line
Program 2.C
C-Language Programs .When variable value is given like below program then we have to mention that variable in int main().
Write a program to print sum of 3 numbers from given numbers.
a=100, b=200 , c=300
#include<stdio.h>
int main()
{
int a=100,b=200,c=300;
int s;
s= a+b+c;
printf("\n sum of all number is %d", s);
return 0;
}
o/p- sum of all number is 600
Note- C-Language Programs %d is used to print the value of S variable which we pass in printf function without the %d we can print the value of s in C-Language Programs.
Program 3.C
Write a program to print sum of 3 numbers and also mean of the given numbers by using C-programming.
a=10, b=20 , c=30
#include<stdio.h>
int main()
{
int a=10,b=20,c=30;
int s;
float m;
s= a+b+c;
m=s/3;
printf("\n sum of all number is %d", s);
printf("\n mean is %d", m);
return 0;
}
o/p- sum of all number is 60
mean is 20.
Data Types In C-programming
There are different data types in C-programming we see the important data types which is mostly used in C-Language Programs.
Following are the Data Types and there Format Specifier and use in C-Language Programs.
1.int
In C-Language Programs if we want to print integer type value then we use format specifier is %d.
int Data type is used to store the integer type value like int a=100,int b=200 etc.
2.float
3.char
4.char[size]
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