Program 88:Number Guessing Game

Program 88:

#include<stdio.h>
main()
{
 int i,num=51,flag=1,guess,count=0;
 printf("Guess the number\n");
 scanf("%d",&guess);
do
 {
 
  if(num==guess)
  {
   flag=0;
  }
  else if(guess<num)
  {
   flag=1;
   printf("Your guess is lower than the number\n");
   count++;
  }
  else
  {
    flag=1;
   printf("Your guess is greater than the number\n");
   count++;
  }
  
  if(flag==1)
  {
    printf("Sorry! Please guess it again\n");
   scanf("%d",&guess);
  }
 } while(flag);
 
 printf("Congrats! You guessed the number %d\n",num);
 printf("Number of trails: %d\n",count);
 
 
}

Explanation:

1. The program starts with initializing
   • num → To store number that user has to guess
   • i → Temporary variable
   • flag→ To store  1 if user didnot guess correctly and 0 if user guessed it correctly
   • count→ To store number of attempts/trails made by user before guessing the number correctly

2. printf("Guess the number\n");
    scanf("%d",&guess);

   Taking guess number from user.

3. do
   { 
   
   } while(flag);
   

   Used do While because the loop should execute atleast once and has to be executed until user guess it correctly.
4. Main Logic goes here:

    
   if(num==guess) {
      flag=0;
     }
     else if(guess<num)
     {
      flag=1;
      printf("Your guess is lower than the number\n");
      count++;
     }
     else
     {
       flag=1;
      printf("Your guess is greater than the number\n");
      count++;
     }
     
     if(flag==1)
     {
       printf("Sorry! Please guess it again\n");
      scanf("%d",&guess);
     }

5. As num=51. Let for the first guess given by user be guess=5.
   • Iteration 1:

     • if(num==guess) {
          flag=0;
         }

       Since 51 is not equal to 5 this if part won't execute
     • 2nd if part guess<num(5<51) is true so flag=1 and prints that user guessed lower number and count will be incremented by 1.So now count=1 indicating 1 wrong attempt.
     • Now flag=1. So

        
       if(flag==1) {
           printf("Sorry! Please guess it again\n");
          scanf("%d",&guess);
         }

       this if part at the end of loop will be executed and takes guess number again from user
     • Now since flag=1 while loop continues to next iteration
     • Now lets take guess=78
   • Iteration 2: 

     • if(num==guess) {
          flag=0;
         }

       Since 51 is not equal to 78 this if part won't execute
     • 2nd if part guess<num(78<51) is false  this if part  also won't execute
     • remaining this is else part

         
       else{
           flag=1;
          printf("Your guess is greater than the number\n");
          count++;
         }

       So again flag=1 and prints guess number is greater.Now count will be incremented by 1.So now count=2. So now user attempted 2 times and guessed wrong one
     • Now flag=1. So

        
       if(flag==1) {
           printf("Sorry! Please guess it again\n");
          scanf("%d",&guess);
         }

       this if part at the end of loop will be executed and takes guess number again from user
     • Now since flag=1 while loop continues to next iteration
   • Iteration 3: Now lets take guess=51

     • if(num==guess) {
          flag=0;
         }

       Since 51 is equal to 51 .flag will become zero.flag=0
     • Reamining if parts will be skipped and while loop will terminate.

6. printf("Congrats! You guessed the number %d\n",num);
    printf("Number of trails: %d\n",count);

   Finally it displays Success message to user and prints number of times user attempted to guess the number correctly and in this case it is 2.

 Output: