1、报错：
Expected token Semicolon got 'eth_compileSolidity' funtion setFunder(uint _u,uint _amount){
解决：
funtion关键字错了，需要用function；
2、报错：
Variable is declared as a storage pointer. Use an explicit "storage" keyword to silence this warning. Funder f = funders[_u]; ^------^
解决：
Funder f，定义指针需要加关键字storage ；修改为Funder storage f = funders[_u];
3、报错：
Invoking events without "emit" prefix is deprecated. e("newFunder",_add,_amount); ^-------------------------^
解决：
调用事件需要在前面加上emit关键字，修改为emit e("newFunder",_add,_amount);
4、报错：
No visibility specified. Defaulting to "public". function newFunder(address _add,uint _amount) returns (uint){ ^ (Relevant source part starts here and spans across multiple lines).
解决：
定义函数必须加上public关键字，修改为function newFunder(address _add,uint _amount) public returns (uint){
5、报错：
"msg.gas" has been deprecated in favor of "gasleft()" uint public _gas = msg.gas; ^-----^
解决：
msg.gas已经被gasleft()替换了。修改为uint public _gas = gasleft();