复数乘法？

请编一个复数乘法

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main(){float a,b,c,d,m,n;printf("\n\tcomplexs product");printf("\nplease input the first complex:");printf("\n\trealpart:");scanf("%f",&a);printf("\tvirtalpart:");scanf("%f",&b);printf("\t%5。2f+i%5。2f",a,b);printf("\nplease input the second complex:");printf("\n\trealpart:");scanf("%f",&c);printf("\tvirtalpart:");scanf("%f",&d);printf("\t%5。2f+i%5。2f\n",c,d);m=a*c-b*d,n=a*d+b*c;printf("The product is:%6。3f+i%6。3f\n");printf("program normal terminated,press enter。。。\n\n");} 。