//可直接调用库函数，试运行的时候能输入choice,但是正确进入switch...
//输入1后直接结束程序。

int main()
{
    Complex z1,z2,z,sum,sub,mul,div,c;
    float a,b;
    char OPTR;
    int choice;
    printf("1.Achieve addition, subtraction, multiplication and division of complex numbers.\n");
    printf("2.Separating the real part from the known complex number.\n");
    printf("3.Separating the image part from the known complex number.\n");
    printf("Please enter the functions you want to achieve:");
    scanf("%d",&choice);
    switch(choice)
    {  case '1':
         {printf("Please input z1:");
          scanf("%f+%fi",&a,&b);
          z1=CreatComplex(a,b);
          printf("Please input z2:");
          scanf("%f+%fi",&a,&b);
          z2=CreatComplex(a,b);
          printf("Please input the operator:%c",&OPTR);
          if(OPTR=='+')
            {sum=Complex_Add(z1,z2);PrintComplex(sum);}
            else if(OPTR=='-')
                {sub=Complex_Sub(z1,z2);PrintComplex(sub);}
            else if(OPTR=='*')
                {mul=Complex_Mul(z1,z2);PrintComplex(mul);}
            else if(OPTR=='/')
                {div=Complex_Div(z1,z2);PrintComplex(div);}
            else
                printf("The operator that you input is wrong!");
          break;}
      case '2':
         {printf("Please input the Complex:");
          scanf("%f+%fi",&a,&b);
          z=CreatComplex(a,b);
          printf("%f",GetReal(z));
          break;}
      case '3':break;
         {printf("Please input the Complex:");
          scanf("%f+%fi",&a,&b);
          z=CreatComplex(a,b);
          printf("%f",GetImage(z));
          break;}
    }
}

scanf("%f%f",&a,&b);