area of circle

#include<stdio.h>
#include<conio.h>
#define pie 3.14
void main()
{
float r,area;

printf("\n enter radius of circle");
scanf("%f",&r);
area=pie*r*r;
printf("area of circle is=%f",area);
getch();
}

wap to convert from celsius to fahrenheit

#include<stdio.h>
#include<conio.h>
void main()
{
float t,f;
clrscr();
printf("\n enter the temperture in degree celsius\n");
scanf("%f",&t);
f=(9.0)/5*t+32;
printf("\n temperature in degree fahrenheit=%.2f",f);

getch();
}

simple interest

#include<stdio.h>
#include<conio.h>
void main()
{
float p,r,t,si;
clrscr();
printf("\n enter principle amount ,rate of interest and time period:\n");
scanf("%f%f%f",&p,&r,&t);
si=(p*r*t)/100;
printf("simple interest is %.2f",si);
getch();
}

wap for x^n

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
float x,value;
int n;
clrscr();
printf("\n enter the value of x and n");
scanf("%f%d",&x,&n);
value=pow(x,n);
printf("%f^%d=%f",x,n,value);
getch();
}

wap for volume of circle

#include<stdio.h>
#include<conio.h>
#define pie 3.14
void main()
{
float r,volume;

clrscr();
printf("\n enter the value of radius ");
scanf("%f",&r);
volume=4*pie*r*r*r/3;
printf("volume=%f",volume);
getch();
}

program for scaling in cg

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
int exp[5][5],scl[5][5],res[5][5],i,n,j,k;
int gd=DETECT,gm;
initgraph(&gd,&gm,"c://tc//bgi");
printf("\n neter the number of size of square matrix");
scanf("%d",&n);
printf("\n ente the points of polygon:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&exp[i][j]);
}
}
printf("the matrix is:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("\t %d",exp[i][j]);
}
}

printf("\n enter element of scl mt");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
scanf("%d",&scl[i][j]);
}
}
printf("the matrix is:");
for(i=0;i<3;i++)
{

for(j=0;j<3;j++)
{
printf("\t %d",scl[i][j]);
}
}
printf("\n result");
for(i=0;i<3;i++)

for(j=0;j<3;j++)
{
res[i][j]=0;
for(k=0;k<3;k++)
{
res[i][j]=res[i][j]+exp[i][k]*scl[k][j];
}
}

printf("\n the resultant matrix is:");
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
printf("%d\t",res[i][j]);
}
}
clrscr();
setcolor(6);
line(exp[0][0],exp[0][1],exp[1][0],exp[1][1]);
line(exp[0][0],exp[0][1],exp[2][0],exp[2][1]);
line(exp[1][0],exp[1][1],exp[2][0],exp[2][1]);
line(res[0][0],res[0][1],res[1][0],res[1][1]);
line(res[0][0],res[0][1],res[2][0],res[2][1]);
line(res[1][0],res[1][1],res[2][0],res[2][1]);
getch();
closegraph();
}

program for hut

program for hut

#include<stdio.h>
#include<conio.h>
#include<graphics.h>
void main()
{
int gd=DETECT,gm;
initgraph(&gd,&gm,"c://tc//bgi");
line(150,200,200,100);
line(200,100,250,200);
line(150,200,150,400);
line(250,200,250,400);
line(150,400,250,400);
line(250,200,450,200);
line(200,100,400,100);
line(400,100,450,200);
line(450,200,450,400);
line(250,400,450,400);
line(150,400,250,400);
rectangle(275,375,425,225);
rectangle(175,400,225,250);
rectangle(290,350,410,250);
line(150,200,250,200);
line(150,400,150,425);
line(250,400,250,425);
line(125,425,250,425);
line(125,425,125,450);
line(225,425,225,450);
line(125,450,225,450);

circle(200,227,17);
circle(200,227,12);

getch();
closegraph();

}