C Simple pro

C Program to reverse a given number

#include

#include

int main()

{

 int num, rem, rev = 0;

   printf("\nEnter any no to be reversed : ");

   scanf("%d", &num);

    while (num >= 1)

     {

      rem = num % 10;

      rev = rev * 10 + rem;

      num = num / 10;

    }

   printf("\nReversed Number : %d", rev);

   return (0);

}

Output

Enter any no to be reversed : 123

Reversed Number : 321

C Program to calculate sum of 5 subjects and find percentage

#include

#include 

int main()

{

   int s1, s2, s3, s4, s5, sum, total = 500;

   float per;

   printf("\nEnter marks of 5 subjects : ");

   scanf("%d %d %d %d %d", &s1, &s2, &s3, &s4, &s5);

   sum = s1 + s2 + s3 + s4 + s5;

   printf("\nSum : %d", sum);

   per = (sum * 100) / total;

   printf("\nPercentage : %f", per);

   return (0);

}

Output

Enter marks of 5 subjects : 80 70 90 80 80

Sum : 400

Percentage : 80.00

C Program to find area and circumference of circle

#include

#include

int main()

{

int rad;

printf("\n Enter radius of circle: ");

scanf("%d",&rd);

area=PI*rad*rad;

printf("\n Area of circle:%f ,area");

ci=2*PI*rad;

printf("\n Circumference:%f",ci);

return(0);

}

Output

Enter radius of a circle :1

Area of circle : 3.14

Circumference:6.28

C Program to Hide Mouse Pointer

#include

#include

#include

#include

void showmouseptr();

void hidemouseptr();

union regs i, o;

int main()

{

   int count = 1, gdriver = detect, gmode;

   initgraph(&gdriver, &gmode, "c\\:tc\\bgi");

   i.x.ax = 0;

   int86(0x33, &i, &o);

   if (o.x.ax == 0)

 {

      printf("ntmouse support is unavailable !!");

   }

else

{

      showmouseptr();

      while (count <= 10)

 {

         getch();

         count++;

         if (count % 2 == 0)

            hidemouseptr();

         else

            showmouseptr();

      }

   }

   getch();

   return 0;

}

void showmouseptr()

 {

   i.x.ax = 1;

   int86(0x33, &i, &o);

}

void hidemouseptr()

{

   i.x.ax = 2;

   int86(0x33, &i, &o);

}