这个用c语言中的if和switch语句怎么写？求解答！

Question

Answer 1

#include <stdio.h>
int main()
{
    int x,y;
    scanf("%d",&x);
    if(x<0)
        y = x-2;
    else if(x>= 0 && x<10)
        y = 3*x;
    else
        y = 4*x+1;
    printf("%d",y);
    return 0;
}