Chapter 5 : Loop Control Instruction.md

Chapter-5 Loop Control Instruction

[A]

  (a)   No Output since ';' is used after while 
  
  (b)   2 3 3
  
  (c)   3 3 1
  
  (d)   prints it infnite times.
  
  (e)   prints 10 infinite times.
  
  (f)   prints nothing.

[B]

(a)

    #include<stdio.h>
     int main()
       {
      int i,hour, extra;
      for(i = 1 ; i <= 10 ; i++) 
       {
          printf("\n");
	printf("Enter the working hour of the employ : ");
	scanf("%d", &hour);
	
	if(hour>40)
	{
		extra = (hour - 40)*12;
		printf("\n%d Rs. is the overtime pay of employee\n", extra);
	}
	else
		printf("\nThis employ has not done overtime.\n");
  }
 return 0;
     }

(b)

      #include<stdio.h>
      int main()
      {
         int i,fact=1,num;
         scanf("%d",&num);
         printf("Ener a number = ");
         for(i=1;i<=num;i++)
         {
           fact*=num;
          }
          printf("%d",fact);
          return 0;
       }

(c)

      #include<stdio.h>
      #include<math.h>
      int main()
      {
        int base,power,d;
        print("Enter value of base = ");
        scanf("%d",&base);
        printf("Enter value of power = ");
        scanf("%d",&power);
        d=pow(base,power);
        printf("%d",d);
        return 0;
      }

(d)

       #include<stdio.h>
       int main()
       {
         int i;
         for(i=0;i<=255;i++)
         printf("\n%d = %c",i,i);
         return 0;
       }

(e)

       #include<stdio.h>
      int main()
      {
      int i,rem,num=0,x;
      for(i=1;i<=500;i++)
      {
      	num=0;
       x=i;
        while(x)
        {
          rem=x%10;
          num=num+(rem*rem*rem);
          x/=10;
         }
        if(num==i)
        printf("%d is a armstrong number\n",i);
       }
       return 0;
       }

(f)

#include<stdio.h>
main()
{

int matchsticks=21, user, computer;

printf("Do not enter Invalid Numbers.\nNumbers above 4 are invalid.");

printf("\nIf you do so, the computer automatically wins.");

while (matchsticks>=1)
{

printf("\nNumber of matchsticks available right now is %d.", matchsticks);

printf("\n\nYour Turn...\n\n\n");

printf("\nPick up the matchstick(s)-- (1-4): ");
scanf ("%d", &user);

if (user>4)

{
printf("Invalid Selection"); 
break;
}

computer=5-user;

printf("\nComputer's Turn..\n" );
printf("\nComputer chooses:%d", computer);

matchsticks=matchsticks-user-computer;
continue;

if(matchsticks==1)

break;
}

matchsticks--;
printf("\nComputer Wins");

}

OR

#include
#include
void main()
{

int matchsticks=21, user, computer;
clrscr();
printf("Do not enter Invalid Numbers.\nNumbers above 4 are invalid.");

printf("\nIf you do so, the computer automatically wins.");

while (matchsticks>=1)
{

printf("\nNumber of matchsticks available right now is %d.", matchsticks);

printf("\n\nYour Turn...\n\n\n");

printf("\nPick up the matchstick(s)-- (1-4): ");
scanf ("%d", &user);

if (user>4)

{
printf("Invalid Selection");
break;
}

computer=5-user;

printf("\nComputer's Turn..\n" );


if(matchsticks==1)

break;
printf("\nComputer chooses:%d", computer);
matchsticks=matchsticks-user-computer;
continue;

}

matchsticks--;
printf("\nComputer Wins");
getch();
}

(g)

 #include<stdio.h>
 int main()
 {
 int num,pos=0,neg=0,zero=0,choice;
  do
  {
    scanf("%d",&num);
    if(num==0)
    zero++;
    else if(n<0)
    neg++;
    else if(n>0)
    pos++;
    printf("Do you want to enter another number? (Enter 1 for yes & 0 for no)");
    scanf("%d",&choice);
   }while(choice);
   printf("Zeroes = %d\n",zero);
   printf("Negatives = %d\n",neg);
   printf("Positives = %d\n",pos);
   return 0;
   }

(h)

    #include<stdio.h>
int main()
{
  int num,rem,oct=0,rev=0,rem1;
  scanf("%d",&num);
  while(num)
  {
    rem=num%8;
    oct=10*oct+rem;
    num/=8;
  }
  while(oct)
  {
   rem1=oct%10;
   rev=rev*10+rem1;
   oct/=10;
   }
     printf("%d is octal equivalent",rev);
    return 0;
    }

OR

#include<stdio.h>
int main()
{   int number;
printf("Enter Number\n");
scanf("%d",&number);
printf("Octal equivalent is %o",number);
return 0;
}

(i)

    #include<stdio.h>
    int main()
    {
int i,num,max,min, N, range;

printf("Enter how many number you want to enter : ");
scanf("%d", &N);

printf("Enter the number : ");
scanf("%d", &num);

max=min=num;

for( i = 1; i < N; i++)
{
	printf("Enter the number : ");
	scanf("%d", &num);
	if(num>max)
		max=num;
	if(num<min)
		min=num;
}
range = max - min;

printf("\n%d is the range of the data.", range);
return 0;
 }