C語言表達分段函數

void main()
{
    int x,y;
    scanf("%d",&x);
    if(x<=1){
        y= x;
    }else if(x>1&&x<10){
        y=2*x-1;
    }else if(x>=10){
        y=3*x-11;
    }
    printf("y=%d",y);
}