复数的加减乘除

#include
using namespace std;
void add(float a,float b,float c,float d)
{
float sum1,sum2;
sum1=a+c;
sum2=c+d;
cout<<"a+c="<cout<<"b+d="<cout<}
void substract( float a,float b,float c,float d)
{
float sum1,sum2;
sum1=a-c;
sum2=b-d;
cout<<"a-c="<cout<<"b-d="<cout<}
void multiply(float a,float b,float c,float d)
{
float sum1,sum2;
sum1=a*c-b*d;
sum2=a*d+b*c;
cout<<"a*c-b*d="<cout<<"a*d+b*c="<cout<}
void divide(float a,float b,float c,float d)

{
float sum1,sum2;
if(c!=0&&d!=0)
{
sum1=a*c+b*d;
sum2=b*c-a*d;
sum1=sum1/(c*c+d*d);
sum2=sum2/(c*c+d*d);
}
cout<}
main()
{
int m;
float a,b,c,d;
cout<<"请输入第一个数的实部与虚部：";
cin>>a>>b;
cout<<"请输入第二个数的实部与虚部：";
cin>>c>>d;
cout<<"请输入你所选择的数字1—4："<cin>>m;
switch(m)
{
case 1:Add(a,b,c,d);
cout<<" 请继续输入：";
cin>>m;
case 2:Substract(a,b,c,d);
cout<<"请继续输入：";
cin>>m;
case 3:Multiply(a,b,c,d);
cout<<"请继续输入：";
cin>>m;
case 4:Divded(a,b,c,d);
cout<<"请继续输入：";
cin>>m;
}
}