作廢?main()?{?浮動?x,y,z;?夏爾?c;
scanf("%f%c%f ",& ampx & amp;c,& ampy);
切換?(?c?)?{
案子?'+':?z = x+y;?打破;
案子?'-':?z = x-y;?打破;
案子?'*':?z = x * y;?打破;
案子?'/':?z=(?y==0?)?(0):(x/y);?打破;
默認:?z = 0;?打破;
}
printf("%f%c%f=%f\n ",x,c,y,z);