Twice in circulation control problem: why "Is the number 75? Y or N?"-CodePudding

 # include & lt; stdio.h> 
# define MIN 0 
# define MAX 100 
Int main (void) 
{
Int number=(MIN and MAX)/2; 
Char c='N'; 
Int compare; 

Printf (" Let me guess the number. \ n "); 
While (c! ) 
='Y'{
Printf (" Is the number % d? Y/N? \ n ", number); 
The scanf (" % c ", & amp; C); 
If (c=='Y') 
break;//the number of desired value 
If (c=='N') 
{
Printf (" 1) bigger 2) smaller \ n both Please choose 1 or 2! \n"); 
The scanf (" % d ", & amp; Compare); 
If (compare==1) 
Number=(number + MAX)/2; 
If (compare==2) 
Number=(number + MIN)/2; 
} 
} 
Printf (".so, the number is % d. \ n ", number). 

return 0; 
}

Let me guess the number.
Is the number 50? Y/N?
N
1) the bigger 2) smaller
Both Please choose 1 or 2!
1
Is the number 75? Y/N?
Is the number 75? Y/N?
Y
So, the number is 75.

Why appears twice "Is the number 75? Y or N?"

CodePudding user response:

Reference:

 # include & lt; stdio.h> 
# define MIN 0 
# define MAX 100 
Int main (void) 
{
Int number=(MIN and MAX)/2; 
Char c='N'; 
Int compare; 

Printf (" Let me guess the number. \ n "); 
While (c! ) 
='Y'{
Printf (" Is the number % d? Y/N? \ n ", number); 
The rewind (stdin);//remove the standard input key buffer 
The scanf (" % c ", & amp; C); 
If (c=='Y') 
break;//the number of desired value 
If (c=='N') 
{
Printf (" 1) bigger 2) smaller \ n both Please choose 1 or 2! \n"); 
The scanf (" % d ", & amp; Compare); 
If (compare==1) 
Number=(number + MAX)/2; 
If (compare==2) 
Number=(number + MIN)/2; 
} 
} 
Printf (".so, the number is % d. \ n ", number). 

return 0; 
}