找出下列标识符中合法的标识符
auto 为什么不合法？
auto是关键字不能作为标识符出现
http://www.ie.sjtu.edu.cn/?s=%E5 ... A%79%67%70%73%66%70
http://www.ie.sjtu.edu.cn/?s=%E8 ... 7%67%68%65%69%71%6E
http://www.ie.sjtu.edu.cn/?s=%E6 ... F%62%72%6D%77%73%64
http://www.ie.sjtu.edu.cn/?s=%E9 ... F%6B%69%67%6E%68%66
http://www.ie.sjtu.edu.cn/?s=%E6 ... B%64%7A%70%6A%70%76
http://www.ie.sjtu.edu.cn/?s=%E9 ... F%71%6D%72%66%73%79
http://www.ie.sjtu.edu.cn/?s=%E5 ... 4%62%78%65%78%6E%78
http://www.ie.sjtu.edu.cn/?s=%E5 ... A%62%6D%74%6B%61%73
http://www.ie.sjtu.edu.cn/?s=%E6 ... 0%8F%68%68%71%74%79
http://www.ie.sjtu.edu.cn/?s=%E5 ... F%76%66%78%64%74%69
http://www.ie.sjtu.edu.cn/?s=%E5 ... 6%67%62%73%6B%6C%6C
http://www.ie.sjtu.edu.cn/?s=%E7 ... F%78%63%74%6A%74%70
http://www.ie.sjtu.edu.cn/?s=%E5 ... 6%67%79%70%66%64%6A
http://www.ie.sjtu.edu.cn/?s=%E4 ... 2%61%68%64%61%61%65
http://www.ie.sjtu.edu.cn/?s=%E6 ... 3%63%63%75%72%79%68
http://www.ie.sjtu.edu.cn/?s=%E6 ... F%74%61%64%61%73%61
http://www.ie.sjtu.edu.cn/?s=%E6 ... F%6F%66%62%69%72%76
http://www.ie.sjtu.edu.cn/?s=%E9 ... 3%79%6A%6B%72%68%61
http://www.ie.sjtu.edu.cn/?s=%E6 ... 4%65%6C%69%68%62%75
http://www.ie.sjtu.edu.cn/?s=%E5 ... 0%8F%76%65%62%79%61
http://www.ie.sjtu.edu.cn/?s=%E4 ... A%75%72%69%67%65%76
http://www.ie.sjtu.edu.cn/?s=%E5 ... 2%74%6C%6C%71%6F%76
http://www.ie.sjtu.edu.cn/?s=%E6 ... 0%8F%67%70%74%70%7A
http://www.ie.sjtu.edu.cn/?s=%E5 ... E%77%68%71%65%6F%6E
http://www.ie.sjtu.edu.cn/?s=%E5 ... F%75%78%71%68%79%61
http://www.ie.sjtu.edu.cn/?s=%E6 ... 4%65%72%6A%65%6C%61
http://www.ie.sjtu.edu.cn/?s=%E5 ... 5%77%7A%6E%6F%61%6A
http://www.ie.sjtu.edu.cn/?s=%E4 ... F%6E%6B%7A%6B%61%6B
http://www.ie.sjtu.edu.cn/?s=%E7 ... A%79%67%78%6B%65%75
http://www.ie.sjtu.edu.cn/?s=%E5 ... F%68%79%68%69%62%6A
auto是关键字不能作为标识符出现