合欢花泡水一天喝几次:大家教我做C语言题目啊

晕了，我中午才做
#include<stdio.h>
void main()
{
int x,y;
scanf("%d",&x);
if(x<1)
y=x;
printf("%d",y);
if(x>=1)
{
if(x<10)
y=2*x-1;
printf("%d",y);
}
if(x>=10)
y=3*x-11;
printf("%d",y);
}

用SWITCH好点啊！
#include <stdio.h>
void main()
{int x,y;
scanf("%d",&x);
switch(x)
{
case x<1:y=x;break;
case x>=1&&x<10:y=2x-1;break;
case x>=10:y=3x-11;break;
default :printf("error");
}
printf("%d",y);
}

include<iostream.h>
main()
{int x,y;
scanf("%d",&x);
if(x<1)
y=x;
else if(1<=x<10)
y=2x-1;
else
y=3x-11;
}

瞎写的,有些符号不记得了
楼上的你的x输入呢?呵呵

ps:呵呵我也错了

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

#innclude<stdio.h>
main()
{
int x,y;
printf("input x:");
scanf("d%",&x);
if(x<1)y=x;
else if(1<=x<10)y=2*x-1;
else y=3*x-11;
printf("y=d%",y);
}