數二大題第一問一般多少分，第二題

#include<stdio.h>
int main(void)
{double x,y;printf("Enter x(x>=0):\n");scanf("%lf",&x);if(x<=50){y=0.53*x;}else{y=0.53*50+(x-50)*0.58;}printf("y=f(%f)=%.2f\n",x,y);return 0;
}