View Code of Problem 69

#include<stdio.h>
void main()
{float x,y;
printf("请输入x的值:\n");
scanf("%f",&x);
printf("%f\n",x);
if (x<1)
y=x;
else if (x<10)
y=2*x-1;
else if (x>=10)
y=3*x-1;
printf("%f\n",y);
}