# include & lt; Stdio. H> 
Void main () {
Int a, [3]. 
//char c; 
Int I, num, mid, flag, legal, m, n, top, bott; 
Int sign=0;//said there was no find the digits 
Num=0; 

Printf (" please input array: "); 
The scanf (" % d ", & amp; A [0]); 
I=1; 
While (I & lt; 3) {
The scanf (" % d ", & amp; A [I]); 
If (a [I] Printf (" \ n the input number is less than a number on, please input again is greater than the value of a number: "); 
} 
The else 
i++; 
} 
Printf (" input array is: "); 
for(i=0; i <3; I++) {
Printf (" % d ", a [I]); 
} 
printf("\n"); 
Flag=1; 
//mid=15/2; 
Mid=0; 
Top=0; 
Bott=14; 
Legal=0; 
While (flag) {
char c; 
Printf (" please enter a search number: "); 
The scanf (" % d ", & amp; Num); 
M=(num & lt; A [0]); 
N=(num & gt; A, [2]). 
If ((num & lt; A [0]) | | (num & gt; A [2]))//is outside the scope of this score 
Legal=1; 
Sign=0; 
Top=0; 
Bott=3; 
While (sign==0 & amp; & (top & lt;=bott)) {
Mid=+ bott (top)/2; 
If (num & gt; A (mids)) 
Top=mid + 1; 
Else if (num & lt; A (mids)) 
Bott=mid - 1; 
The else {
Printf (" % d is the first % d a element of the array of values ", num, mid); 
break; 
Sign=1; 
} 


} 

if(! Sign | | legal==1) 
Printf (" without this number, \ n "); 
//char c; 
Printf (" whether or not to input (Y/N) "); 
The scanf (" % c ", & amp; C); 
If (c=='Y') 
Flag=1; 
The else 
flag=0; 
} 

} 

Why every time I perform to "whether or not to enter", then I can't input, jump straight to flag=0, and then exit the cycle???????

CodePudding user response:

Please reply to

CodePudding user response:

Printf (" whether or not to input (Y/N) ");
fflush(stdin);//try to empty the keyboard input buffer
The scanf (" % c ", & amp; C);

CodePudding user response:

You give blocked the char c

CodePudding user response:

refer to the second floor u010165006 response:

printf (" whether or not to input (Y/N) ");
fflush(stdin);//try to empty the keyboard input buffer
The scanf (" % c ", & amp; C);

I tried, I can't

CodePudding user response:

The

reference 3 floor m_merelyyang response:

you give blocked the char c

I also think so, how to solve

CodePudding user response:

I put the void main () to int main () on the DEVC++ compiled under didn't you say the problem, and you have a problem of algorithm

CodePudding user response:

if(! Sign | | legal==1)
Printf (" without this number, \ n "); It seems to be out of question anyway show no such number

CodePudding user response:

Printf (" the first % d % d is in the array element values \ n ", num, mid + 1);
Sign=1;
break;
For such then void main () to int main ()
Printf (" the first % d % d is in the array element values \ n ", num, mid); To printf (" the first % d % d is in the array element values \ n ", num, mid + 1);
With respect to OK