#include <stdio.h>
#define PI=3.1415926
main()
{
float R;
float C=0,H=0,V=0;
printf("Please input a R:");
scanf("%f,&R");
C=2*PI*R;
printf("C=%f\n",C);
printf("Please input a H:");
scanf("%f,&H");
V=PI*R*R*H;
printf("V=%f\n",V);
}
2个公式出现语法错误,怎么错的?