Addition of two equations-FUN

Q: Addition of two equations.

equ1- Study=Don't Fail
equ2- Don't Study=Fail
Ans: Study+Don't Study = Fail+Don't Fail
=>Study(1+Don't)=Fail(1+Don't)
=>Study=Fail

WAP to Convert Decimal to Binary

/*Convert Decimal to Binary*/

#include<stdio.h>
#include<conio.h>
void main()
{
 clrscr();
 int a,b,x,y,i[5],j,r;
 printf("Enter  no.");
 scanf("%d",&a);
 x=a%2;
 y=a/2;
 b=(y*2)+(x);
 for(j=0;b!=0;b/=2)
 {
  i[j]=b%2;
  j++;
 }
 for(r=j-1;r>=0;r--)
 {
  printf("%d",i[r]);
 }
 getch();
}

Write a program to convert Octal to Binary

/*Write a program to convert Octal to Binary*/

#include<stdio.h>

#include<conio.h>

void main()

{

 clrscr();

 int a,b;

 printf("Enter 2 digit octal no.");

 scanf("%d",&a);

 int x,y;

 x=a%10;

 y=a/10;

 b=(y*8)+(x);//changing no. to decimal

 int i[5];

 for(int j=0;b!=0;b/=2)

 {



  i[j]=b%2;

  j++;

 }

 for(int r=j-1;r>=0;r--)

 {

  printf("%d",i[r]);
 }
 getch();
}

WAP to print star

/*WAP to print star*/

#include<stdio.h>
#include<conio.h>
void main()
{
int i,n,j;
clrscr();   //clear screen

for(i='A';i<='E';i++) //loop starts from 1 for row
{
for(j='A';j<=i;j++)   // loop executes i times for colom
printf("%c",j);   // print j
printf("\n");    // goto next line
}
getch();
}