Algorithm increases 6-17 complex arithmetic

Algorithm increases 6-17 complex arithmetic time limit: 1.0s memory limit: 512.0MBDesign complex number library, realize the basic complex subtraction operation.
Typing only the real and imaginary parts, separated by a space, two complex numbers with operator separation, the output by A+bi format on the screen printing results. Participate in sample input and sample output.
Note In special cases, the output string "error" cannot be computed. Sample Input 2 4 *-3 2 Sample Output -14-8i Sample input 3-2 +-1 3 sample output 2+1i There's a set of data that doesn't work.

#include <iostream>#include<cstdio>#include<vector>#include<queue>#include<cstring>#include<algorithm>#include<cstdlib>#definefor (i,x,n) for (int i=x;i<n;i++)#definell Long Long int#defineINF 0x3f3f3f3f#defineMOD 1000000007#defineMax_n 50005using namespacestd;intMain () {//freopen ("Data.txt", "R", stdin); //freopen ("Data.out", "w", stdout);    Doublea,b,c,d; Charcc; scanf ("%LF%LF",&a,&b);    GetChar (); scanf ("%c",&cc); scanf ("%LF%LF",&c,&d); if(cc=='+'){        if(b+d>0) {printf ("%g+%gi", a+c,b+d); }Else if(b+d<0) {printf ("%g%gi", a+c,b+d); }Else if(b+d==0) {printf ("%g", A +c); }    }    if(cc=='-'){        if(b-d>0) {printf ("%lf+%lfi", a-c,b-d); }Else if(b-d<0) {printf ("%lf%lfi", a-c,b-d); }Else if(b-d==0) {printf ("%LF", A-c); }    }    if(cc=='*'){        if(a*c-b*d==0&&a*d+b*c!=0) {printf ("%gi", a*d+b*c); }Else if(a*d+b*c==0&&a*c+b*d!=0) {printf ("%g", a*c-b*d); }Else{            if(a*d+b*c<0) {printf ("%g%gi", a*c-b*d,a*d+b*c); }Else{printf ("%g+%gi", a*c-b*d,a*d+b*B); }        }    }    if(cc=='/'){        DoubleShi= (a*c+b*d)/(c*c+d*d); Doublexu= (b*c-a*d)/(c*c+d*d); if(c==0&&d==0) {printf ("error\n"); }Else{            if(xu>0) {printf ("%g+%gi", Shi,xu); }            if(xu==0) {printf ("%g", Shi); }Else{printf ("%g%gi", Shi,xu); }        }    }    //fclose (stdin); //fclose (stdout);    return 0;}//3 3 * 3 3

Algorithm increases 6-17 complex arithmetic