Data_Structure/作業/unit1/binary-search-square-root/main.c

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main() {
	int i;
	double precision = 1e-10 , x;
	
	printf("***<2A><><EFBFBD>Jx<4A><78>(x>0)<29>p<EFBFBD>⥭<EFBFBD><E2A5AD><EFBFBD><EFBFBD>***\n");
	printf("<EFBFBD><EFBFBD><EFBFBD>Jx<EFBFBD><EFBFBD>=> ");
	scanf("%lf",&x);
	double mid , lower , upper;

	
	if(x<0){
		printf("<EFBFBD><EFBFBD><EFBFBD>~! X<>Ȥ<EFBFBD><C8A4><EFBFBD><1");
		return 1;
	}
	
	if(x>1){
		lower=0 , upper=x , i=0;
		while (upper - lower > precision) {
		    mid = (lower + upper) / 2.0;  
		    printf("#%d\t[%.10f,%.10f]\t<EFBFBD><EFBFBD>=%.10f\n",i+1,lower,upper,mid);
		    i++;
		    if (mid * mid > x) {
		        upper = mid;
		    } else {
		        lower = mid;
		    }
		}
	}
	
	if(x<1){
		lower=x , upper=1 ,i=0;
		while (upper - lower > precision) {
		    mid = (lower + upper) / 2.0;  
		    printf("#%d\t[%.10f,%.10f]\t<EFBFBD><EFBFBD>=%.10f\n",i+1,lower,upper,mid);
		    i++;
		    if (mid * mid > x) {
		        upper = mid;
		    } else {
		        lower = mid;
		    }
		}
	}
	
	printf("%f<><66><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڬ<EFBFBD>%.10f\n",x,mid);
	printf("sqrt(%f)<29><><EFBFBD><EFBFBD><EFBFBD>G<EFBFBD><47>%.10f\n",x,sqrt(x));
	
	return 0;
}