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#include <stdio.h>
 
int main(void) {
 
int array[]={0,1,2,3,4,5,6};
int head=0;
int tail=6;
int key=5;
int center;
 
 
	for(;;){
		if(head<=tail)
			center=(head+tail)/2;
	else
		printf("ilchi X")
		break;
 
	if(array[center]==key)
		printf("key=%d",center);
		break;
	else if(array[center]<key)
		head=center+1
 
	else
		tail=center-1
 
	}
 
}
 
 
 
 

prog.c: In function ‘main’:
prog.c:17:3: error: expected ‘;’ before ‘break’
   break;
   ^~~~~
prog.c:19:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
  if(array[center]==key)
  ^~
prog.c:21:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
   break;
   ^~~~~
prog.c:22:2: error: ‘else’ without a previous ‘if’
  else if(array[center]<key)
  ^~~~
prog.c:25:2: error: expected ‘;’ before ‘else’
  else
  ^~~~

Standard output is empty