C语言 要求编写一个简单计算器的程序

#includevoid main() { float x,y,z; char c; scanf("%f%c%f",&x,&c,&y); switch ( c ) { case '+': z=x+y; break; case '-': z=x-y; break; case '*': z=x*y; break; case '/': z=( y==0 )?(0):(x/y); bre