Decimal number to hexadecimal and octal number

Program:

#include<stdio.h>
int main()
{
int x;
printf("Enter decimal number: ");
scanf("%d",&x);
printf("Decimal Number: %d\n",x);
printf("Hexadecimal Number: %x\n",x);
printf("Octal Number: %o\n",x);
}

Output:

Feet to meter

Program:

#include<stdio.h>
int main()
{
float f,m;
printf("\nEnter feet : ");
scanf("%f",&f);
m=f*0.3048;
printf("meter: %.4f",m);
return 0;

}

Output:

Meter to feet

Program:

#include<stdio.h>
int main()
{
float f,m;
printf("\nEnter meter : ");
scanf("%f",&m);
f=m/0.3048;
printf("Feet: %.4f",f);
return 0;

}

Output:

Fahrenheit to celsius

Program:

#include<stdio.h>
int main()
{
float f,c;
printf("\nEnter Temperature in fahrenheit: ");
scanf("%f",&f);
c=(f-32)*5/9;
printf("Temperature in celsius: %.4f",c);
return 0;

}

Output:

Celsius to fahrenheit

Program:

#include<stdio.h>
int main()
{
float f,c;
printf("\nEnter Temperature in celsius: ");
scanf("%f",&c);
f=c*9/5+32;
printf("Temperature in fahrenheit: %.4f",f);
return 0;

}

Output:

Swap two numbers without using third variable

Program:

#include<stdio.h>
int main()
{
 int x,y;
 printf("Enter two numbers: \n");
 scanf("%d %d",&x,&y);
 printf("Before swapping x= %d and y= %d\n",x,y);
 x=x+y;
 y=x-y;
 x=x-y;
 printf("After swapping x= %d and y= %d\n",x,y);
 return 0;

}

Output:

Swap two numbers

Program:

#include<stdio.h>
int main()
{
 int x,y,temp;
 printf("Enter two numbers: \n");
 scanf("%d %d",&x,&y);
 printf("Before swapping x=%d and y=%d\n",x,y);
 temp=x;
 x=y;
 y=temp;
 printf("After swapping x=%d and y=%d\n",x,y);
 return 0;

}

Output:

Find simple interest

Program:

#include<stdio.h>
int main()
{
float p,r,n,i;
printf("Enter principle amount: ");
scanf("%f",&p);
printf("Enter rate of interest: ");
scanf("%f",&r);
printf("Enter number of years: ");
scanf("%f",&n);
i=(p*r*n)/100;
printf("Simple Interest is : %.2f",i);
return 0;

}

Output:

Volume of sphere

Program:

#include<stdio.h>
int main()
{
float r,pi=3.14,v;
printf("Enter radius of sphere: ");
scanf("%f",&r);
v=(4*pi*r*r*r)/3;
printf("Volume of sphere: %.2f\n",v);
return 0;

}

Output:

Volume of cylinder

Program:

#include<stdio.h>
int main()
{
float r,pi=3.14,h,v;
printf("Enter radius of cylinder: ");
scanf("%f",&r);
printf("Enter height of cylinder: ");
scanf("%f",&h);
v=pi*r*r*h;
printf("Volume of cylinder: %.2f\n",v);
return 0;

}

Output:

Area of rectangle

Program:

#include<stdio.h>
int main()
{
int l,w,a;
printf("Enter Length: ");
scanf("%d",&l);
printf("Enter Width: ");
scanf("%d",&w);
a=l*w;
printf("Area of Rectangle: %d\n",a);
return 0;

}

Output:

Area of triangle

Program:

#include<stdio.h>
int main()
{
float b,h,a;
printf("Enter Base: ");
scanf("%f",&b);
printf("Enter Height: ");
scanf("%f",&h);
a=(b*h)/2;
printf("Area of Triangle: %.2f\n",a);
return 0;

}

Output:

Area of circle

Program:

#include<stdio.h>
int main()
{
float r,pi=3.14,a;
printf("Enter radius of circle: ");
scanf("%f",&r);
a=pi*r*r;
printf("Area of circle: %.2f\n",a);
return 0;
}

Output:

Multiplication of two numbers

Program:

#include<stdio.h>
int main()
{
int num1,num2,num3;
printf("Enter First Number: ");
scanf("%d",&num1);
printf("Enter Second Number: ");
scanf("%d",&num2);
num3=num1*num2;
printf("Multiplication Of Two Number: %d\n",num3);
return 0;
}

Output:

Sum of two numbers

Program:

#include<stdio.h>
int main()
{
int num1,num2,num3;
printf("Enter First Number: ");
scanf("%d",&num1);
printf("Enter Second Number: ");
scanf("%d",&num2);
num3=num1+num2;
printf("Sum Of Two Number: %d",num3);
return 0;
}

Output: