请看这个程序哪里有错？
# <stdio.h>
void main()
{
int x,y;
printf( "please input x ");
scanf( "%d ",&x);
if(x <1)y=x;
if(x <=1&&x <10)y=2x-1;\\程序提示这里错
if(x> =10)y=3x-11;\\程序提示这里错
printf( "%d\n ",y);
}

我运行的时候他说这2句有错误``我搞不懂错误在哪？知道的说下~谢谢了~

[解决办法]
完整的如下：
#include <stdio.h>
int main()
{
int x,y;
printf( "please input x ");
scanf( "%d ",&x);
if(x <1)y=x;
if(x> =1&&x <10)y=2x-1;
if(x> =10)y=3x-11;
printf( "%d\n ",y);
}
或：
#include <stdio.h>
int main()
{
float x,y;
printf( "please input x ");
scanf( "%f ",&x);
if(x <1)y=x;
if(x> =1&&x <10)y=2x-1;
if(x> =10)y=3x-11;
printf( "%f\n ",y);
}