pat-bl-1051

pat-bl-1051

2017-01-22

• 本题大坑：精确度的问题，绝对值小于0.01就认为是0；我看到也有判0.005的，好像也能过测试点，所以测试点就是个坑╮(╯▽╰)╭
• 还有就是零的时候也要进行输出

/** * pat-bl-1051 * 2017-01-22 * C version * Author: fengLian_s */#include<stdio.h>#include<math.h>int main(){  freopen("in.txt", "r", stdin);  double r1, p1, r2, p2;  scanf("%lf %lf %lf %lf", &r1, &p1, &r2, &p2);  double resultA, resultB;  resultA = r1 * r2 * cos(p1 + p2);  resultB = r1 * r2 * sin(p1 + p2);  //test:  //resultB = 0.005;  if(fabs(resultA) < 0.01)//坑：精确度的问题    resultA = 0;  if(fabs(resultB) < 0.01)    resultB = 0;  if(resultB < 0)    printf("%.2lf%.2lfi\n", resultA, resultB);  else    printf("%.2lf+%.2lfi\n", resultA, resultB);}

-FIN-