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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:23:4: error: expected ‘;’ before ‘break’
    break;
    ^~~~~
prog.c:20:2: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
  else
  ^~~~
prog.c:25:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘else’
   if(array[center]==key)
   ^~
prog.c:25:3: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
prog.c:29:4: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
    break;
    ^~~~~
prog.c:31:3: error: ‘else’ without a previous ‘if’
   else if(array[center]<key)
   ^~~~
prog.c:35:3: error: expected ‘;’ before ‘else’
   else
   ^~~~

Standard output is empty