Program to calculate sum of square series using while loop in C.

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/*program to calculate sum of the series 
(1*1)+(2*2)+(3*3)+(4*4)+.......+(n*n).
Square number series. 
where n is the limit entered by user.
*/

#include<stdio.h>
#include<conio.h>
void main()
{
int i,sum,num;

clrscr();

sum=0;

printf("\nEnter limit : ");
scanf("%d",&num);

printf("\nSquare Number Series ");

printf("\nSeries= ");

i=1;                   //initialization 

while(i<=num)
{
sum=sum+(i*i);
printf("+ (%d*%d)",i,i);

i++;       // increment post fix operator 

}

printf("\n\nSum of series= %d",sum);

getch();
}

Program to calculate sum of series using for loop without power function in C.

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/*Program to calculate sum of series

 1/(1square)+1/(2 square)+1/(3 square)+.......+1/(n square).

 where n is the value entered by user.

 =>Explicit type conversion

*/

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n;
float sum;
clrscr();
sum=0;

printf("\nEnter limit number : ");
scanf("%d",&n);


printf("\nSeries=");

printf("\n---------------------\n");

for(i=1;i<=n;i++)
{

printf(" +1/(%d*%d) ",i,i);
sum=sum+(float)1/(i*i); //Explicit type conversion

}

printf("\n---------------------\n");

printf("\nSum of series= %.3f",sum);

getch();
}

Program to Solve Quadratic Equation in C.

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/* Program to Solve Quadratic Equation */

/* In quadratic equation we need values of a,b,c
and D=(b square -4.a.c)
and every thing depends on the value of D
*If D grater than 0 multiple and real root
*If D==0 only single root
*If D is less than 0 than imaginary roots

from codeboxc.blogspot.com

*/

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
int a,b,c,D;

float x1,x2,D1;

clrscr();

printf("\nEnter Values");
printf("\n a = ");
scanf("%d",&a);

printf("\n b = ");
scanf("%d",&b);

printf("\n c = ");
scanf("%d",&c);

printf("\nEnterd Values are : a=%d b=%d c=%d",a,b,c);

printf("\nQuadratic Equation Calculation:");

D=((b*b)-(4*a*c));

printf("\nValue of Normal D= %d ",D);
D1=abs(D);
D1=sqrt(D1);

printf("\nValue of Squared D= %.3f ",D1);

if(D>0)
{ //Multiple Roots
printf("\nReal & Multiple Roots");


x1=((b+D1)/(2*a));

x2=((b-D1)/(2*a));

printf("\n\nRoots are X1=%.3f X2=%.3f ",x1,x2);

}
else if(D==0)
{ //Single Root
printf("\nReal & Single Roots");

x1=((b)/(2*a));

printf("\n\nRoots are X1=%.3f",x1);

}
else
{ //Imaginary Part

printf("\nImaginary Roots");

printf("\nX1=(%d+%.3fi)/2*%d",b,D1,a);

printf("\nX2=(%d-%.3fi)/2*%d",b,D1,a);

}

getch();
}

Program to print square and cube of any number in C.

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/* program to print a square and cube of any number */

#include<stdio.h>
#include<conio.h>
void main()
{
int a,sq,cu;

printf("\nEnter a number:");
scanf("%d",&a);
sq=a*a;
cu=a*sq;

printf("\n--------------------");
printf("\n\t Number:%d",a);
printf("\n\t Square:%d",sq);
printf("\n\t Cube  :%d",cu);

printf("\n--------------------");

getch();
}

program to print square and cube of numbers between a given range by user in C.

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/* program to print square and cube of numbers between range*/

#include<stdio.h>
#include<conio.h>
void main()
{
int i,sq,cu,br,ij;

printf("\nEnter Start number:");
scanf("%d",&br);
printf("\nEnter End number:");
scanf("%d",&ij);
printf("\n--------------------");

for(i=br;i<=ij;i++)
{
sq=i*i;
cu=i*sq;
printf("\n\t Number:%d",i);
printf("\n\t Square:%d",sq);
printf("\n\t Cube  :%d",cu);

printf("\n--------------------");

}

getch();
}