BC#29第一题

//取对数比较就好了log(ab)=b∗log(a),注意会有精度误差

AC代码：

#include<stdio.h>#include<string.h>#include<algorithm>using namespace std;#include<math.h>int main(){double a,b,c,d;while(scanf("%lf%lf%lf%lf",&a,&b,&c,&d)!=EOF){double m=b*log(a);double n=d*log(c);if(m-n>1e-10){printf(">\n");}else if(n-m>1e-10){printf("<\n");}else{printf("=\n");}}return 0;}