结构-06. 复数四则运算(15)

 1 #include <cstdio>
 2 #include <cmath>
 3 #define EPS 1e-1
 4 
 5 void print1(double a,double b,double c,double d,char op)
 6 {
 7     printf("(%.1f%+.1fi) %c (%.1f%+.1fi) = ",a,b,op,c,d);        
 8 }
 9 
10 void print2(double a,double b)
11 {
12     if(fabs(a)<=EPS && fabs(b)<=EPS)
13        printf("0.0\n");
14     else if(fabs(b)<=EPS)
15        printf("%.1f\n",a);
16     else if(fabs(a)<=EPS)
17        printf("%.1fi\n",b);
18     else
19        printf("%.1f%+.1fi\n",a,b);    
20 }
21 
22 int main()
23 {
24     double a,b,c,d;
25     scanf("%lf%lf%lf%lf",&a,&b,&c,&d);
26     print1(a,b,c,d,‘+‘);
27     print2(a+c,b+d);
28     print1(a,b,c,d,‘-‘);
29     print2(a-c,b-d);
30     print1(a,b,c,d,‘*‘);
31     print2(a*c-b*d,a*d+b*c);
32     print1(a,b,c,d,‘/‘);
33     print2((a*c+b*d)/(c*c+d*d),(b*c-a*d)/(c*c+d*d));
34     return 0;
35 }