// Hello world example
#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("Hello World");
getch();
}
Output:
Hello World
..............................
// simple printf example
#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("\tMy Introduction\n");
printf("Hey Friends I m Shukla\n");
printf("I am student of Be supportbihar.com");
printf("\nC programming is best for me.");
printf("\t");
getch();
}
Output:
My Introduction
Hey Friends I am shukla
I m student of Be supportbihar.com
C programming is best for me.
............................
// print integer example
#include < stdio.h >
int main()
{
int a;
printf("Enter a integer number\n");
scanf("%d", &a);
printf("You have Entered number %d\n", a);
return 0;
}
Output:
Enter a integer number
1001
You have Entered number 1001
...............................
// simple addition of static value
#include<stdio.h>
#include<conio.h>
void main()
{
int a=12,b=4,c;
clrscr();
c=a+b;
printf("c::%d",c);
getch();
}
Output:
c::16
............................
// simple division example
#include<stdio.h>
#include<conio.h>
main()
{
int a=10,b=5,c;
clrscr();
c=a/b;
printf("c::%d",c);
getch();
}
Output:
c::2
........................
// sum sub mul and div example
#include<stdio.h>
#include<conio.h>
void main()
{
int a=10,b=3,c,r;
float d;
clrscr();
printf("The value of A is %d",a);
printf("\nThe value of B is %d",b);
c=a+b;
printf("\nSum is %d\n",c);
c=a-b;
printf("Subtration is %d\n",c);
printf("Multipliction is %d",a*b);
d=a/b;
printf("\nDivision is %.4f",d);
r=a%b;
printf("\nRemaindr is %d",r);
getch();
}
Output:
The value of A is 10
The value of B is 3
Sum is 13
Subtraction is 7
Multiplication is 30
Division is 3.3333
Remainder is 1
....................
// Global and local variable example
#include <stdio.h>
#include <conio.h>
int x = 14; /* Global Variable */
int main()
{
int y = 23; /* Local Variable */
clrscr();
printf( "\n x = %d, y = %d", x, y );
getch();
return 0;
}
Output:
x = 10, y = 20
..........................
// Program to introduce scanf function.
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
float c;
clrscr();
printf("Enter the value of A\n");
scanf("%d",&a);
printf("Enter the value of B\n");
scanf("%d",&b);
printf("Enter the value of C\n");
scanf("%f",&c);
printf("\n\nA:%d\nB:%d\nC:%f",a,b,c);
getch();
}
Output:
Enter the value of A
10
Enter the value of B
20
Enter the value of C
14.02
A:10
B:20
C:14.02
.....................
// addition using scanf
#include<conio.h>
void main()
{
int a,b,c;
clrscr();
printf("enter the value a:\n");
scanf("%d",&a);
printf("enter the value b:\n");
scanf("%d",&b);
c=a+b;
printf("c::%d",c);
getch();
}
Output:
enter the value a:
10
enter the value b:
20
c::30
......................
//subtract two numbers without using subtraction operator
#include<stdio.h>
int main(){
int a,b,sum;
printf("Enter any two integers: ");
scanf("%d%d",&a,&b);
sum = a + ~b + 1;
printf("Difference of two integers: %d",sum);
return 0;
}
Output:
Enter any two integers: 10 4
Difference of two integers: 6
.........................
// find square root of number example
#include<stdio.h>
#include<math.h>
int main(){
int num;
scanf("%d",&num);
printf("Square root: %f",sqrt(num));
return 0;
}
Output:
25
Square root: 5
.....................
/*Program to find gross salary.*/
#include<stdio.h>
void main()
{
int gs,bs,da,ta;
printf("Enter basic salary:");
scanf("%d",&bs);
da=(10*bs)/100;
ta=(12*bs)/100;
gs=bs+da+ta;
printf("gross salary=%d",gs);
}
Output:
Enter basic salary:10000
gross salary=12200
............
// Find area of circle using #define
#include<stdio.h>
#include<conio.h>
#define PI 3.142
{
float r,a;
clrscr();
printf("enter the radius:\n");
scanf("%f",&r);
a=PI*r*r;
printf("Area of Circle is %.2f",a);
getch();
}
Output:
enter the radius:
10
Area of Circle is 314.00
........................
// Find area of circle using #define
#include<stdio.h>
#include<conio.h>
#define PI 3.142
{
float r,a;
clrscr();
printf("enter the radius:\n");
scanf("%f",&r);
a=PI*r*r;
printf("Area of Circle is %.2f",a);
getch();
}
Output:
enter the radius:
10
Area of Circle is 314.00
........................
// Find volume of cube
#include<stdio.h>
#include<conio.h>
{
int l,b,h,v;
clrscr();
printf("enter the value of l:\n");
scanf("%d",&l);
printf("enter the value of b:\n");
scanf("%d",&b);
printf("enter the value of h:\n");
scanf("%d",&h);
v=l*b*h;
printf("Volume Of Cube::%d",v);
getch();
}
Output:
enter the value of l:
10
enter the value of b:
10
enter the value of h:
10
volume of Cube:1000
.......................
// Find months andremaining day from total days
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,r;
clrscr();
printf("enter the value a:\n");
scanf("%d",&a);
b=a/30;
printf("Month::%d\n",b);
r=a%30;
printf("Remaining Days::%d",r);
getch();
}
Output:
enter the value a:
65
Month::2
Remaining Days::5
...................
// Find simple interest
#include<stdio.h>
#include<conio.h>
void main()
{
float i,p,r,n;
clrscr();
printf("enter the value p:\n");
scanf("%f",&p);
printf("enter the value r:\n");
scanf("%f",&r);
printf("enter the value n:\n");
scanf("%f",&n);
i=(p*r*n)/100;
printf("Interest::%f",i);
getch();
}
Output:
enter the value of p:
1200
enter the value of r:
1.2
enter the value of n:
3
Interest::43.2
.......................
// Find differenciate in rupees and paisa
#include<stdio.h>
#include<conio.h>
void main()
{
int r,p;
float a;
clrscr();
printf("enter the value a:\n");
scanf("%f",&a);
r=a;
printf("\nTotal Rupees:%d\n",r);
p=(a-r)*100;
printf("\nTotal Paisa:%d\n",p);
getch();
}
Output:
enter the value a:
12.50
Total Rupees:12
Total Paisa:50
...............................
// Swapping of two number using third variable
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,temp;
clrscr();
printf("\nEnter the value of A\n");
scanf("%d",&a);
printf("\nEnter the value of B\n");
scanf("%d",&b);
clrscr();
printf("\nBefore swapping\n");
printf("A::%d\nB::%d",a,b);
temp=a;
a=b;
b=temp;
printf("\nAfter swapping\n");
printf("A::%d\nB::%d",a,b);
getch();
}
Output:
Enter the value of A
25
Enter the value of B
20
Before swapping
A::25
B::20
After swapping
A::20
B::25
...................
// Swapping of two number without third variable
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b,temp;
clrscr();
printf("\nEnter the value of A\n");
scanf("%d",&a);
printf("\nEnter the value of B\n");
scanf("%d",&b);
clrscr();
printf("\nBefore swapping\n");
printf("A::%d\nB::%d",a,b);
a=b+a;
b=a-b;
a=a-b;
/* or directly use this another method
* a=a+b-(b=a);
*/
printf("\nAfter swapping\n");
printf("A::%d\nB::%d",a,b);
getch();
}
Output:
Enter the value of A
25
Enter the value of B
20
Before swapping
A::25
B::20
After swapping
A::20
B::25
......................
// swap the contents of two numbers using bitwise XOR
#include <stdio.h>
void main()
{
long i, k;
printf("Enter two integers ");
scanf("%ld %ld", &i, &k);
printf(" Before swapping \ni= %ld\nk = %ld", i, k);
i = i ^ k;
k = i ^ k;
i = i ^ k;
printf(" After swapping \ni= %ld\nk = %ld", i, k);
}
Output:
Enter two integers
45
89
Before swapping
i= 45
k = 89
After swapping
i= 89
k = 45
.....................
// Example show use of getchar
#include<stdio.h>
#include<conio.h>
void main()
{
char a,b;
clrscr();
printf("\nEnter one character\n");
scanf("%c",&a);
printf("Input character is ==> %c",a);
fflush(stdin);//to clear input buffer
printf("\n\n\nEnter second character");
b=getchar();
printf("\nASCII value of character(%c)is=> %d",b,b);
getch();
}
Output:
Enter one character
p
Input character is ==> p
Enter second character
n
ASCII value of character(n)is=> 110
....................
// Example show Use of Putchar
#include<stdio.h>
#include<conio.h>
void main()
{
char a,b;
clrscr();
printf("\nEnter one lowercase character\n");
a=getchar();
printf("Lowercase character is ==>");
putchar(a);
printf("\n\nCharacter in uppercase ==>");
putchar(a-32);
getch();
}
Output:
Enter one lowercase character
n
Lowercase character is ==>
n
Character in uppercase ==>
N
.......................
// Example show Use of getche
#include<stdio.h>
#include<conio.h>
void main()
{
char a,b;
clrscr();
printf("\nEnter first character ");
a=getche();
printf("\nSecond character ");
b=getche();
printf("\n\nFirst Character==> %c\nSecond Character==>%c",a,b);
getch();
}
Output:
Enter first character
D
Second character
S
First Character==> D
Second Character==>S
....................
// Use of comma opearor
#include<stdio.h>
#include<conio.h>
void main()
{
int n;
int m;
clrscr();
printf("Program to comma operator\n\n");
printf("\nEnter the value of N\n");
scanf("%d",&n);
m=(n,n+5);
printf("\nAfter use of comma operator value is %d",m);
getch();
}
Output:
Program to comma operator
Enter the value of N
5
After use of comma operator value is 10
.......................
// program to multiply given number by 4 using bitwise operators
#include <stdio.h>
void main()
{
long number, tempnum;
printf("Enter an integer ");
scanf("%ld", &number);
tempnum = number;
number = number << 2;
printf("%ld x 4 = %ld", tempnum, number);
}
Output:
Enter an integer
450
450 x 4 = 1800
.................
// Program to display function without using the Main Function
#include <stdio.h>
#define decode(s,t,u,m,p,e,d) m##s##u##t
#define begin decode(a,n,i,m,a,t,e)
int begin()
{
printf(" Hello Developers ");
}
Output:
Hello Developers
................
// Program to display function without using the Main Function
#include <stdio.h>
#define decode(s,t,u,m,p,e,d) m##s##u##t
#define begin decode(a,n,i,m,a,t,e)
int begin()
{
printf(" Hello Developers ");
}
Output:
Hello Developers
..................
// Program to convert temperature from degree centigrade to Fahrenheit.
#include<stdio.h>
int main() {
float celsius, fahrenheit;
printf("Enter temp in Celsius : ");
scanf("%f", &celsius);
fahrenheit = (1.8 * celsius) + 32;
printf("\nTemperature in Fahrenheit : %f ", fahrenheit);
return (0);
}
Output:
Enter temp in Celsius : 32
Temperature in Fahrenheit : 89.59998
.................
// Shift inputed data by two bits to the left.
#include<stdio.h>
void main(){
int x,y;
printf("Read the integer from keyboard :-");
scanf("%d",&x);
x<<=2;//left shift operator
y=x;
printf("\nThe left shifted data is = %d",y);
}
Output:
Read the integer from keyboard :-10
The left shifted data is = 40
.................
//ASCII value of given character
#include<stdio.h>
int main(
char c;
printf("Enter any character: ");
scanf("%c",&c);
printf("ASCII value of given character: %d",c);
return 0;
}
Output:
Enter any character: N
ASCII value of given character: 78
.........................
// goto statement forword jump
#include <stdio.h>
#include <conio.h>
int main()
{
int a = 10;
clrscr();
printf( "\n Nils Patel" );
if( a == 10 )
{
goto LABEL;
}
printf( "\n This simple" );
printf( "\n Program" );
LABEL:
printf( "\n go to statement" );
printf( "\n Forword jump" );
getch();
return 0;
}
Output:
Nils Patel
go to statement
Forword jump
.......................
// goto statement with backward jump
#include <stdio.h>
#include <conio.h>
int main()
{
int i;
clrscr();
i = 1;
Label:
printf( " %d", i );
i++;
if( i <= 10 )
{
goto Label;
}
getch();
return 0;
}
Output:
1 2 3 4 5 6 7 8 9 10
Thanks Author Vinod Shukla From Bihar.