C语言错误：error stray ‘ 302’ in program

程序编译出错：

$ cc a.c
a.c: In function ‘main’:
a.c:16:9: error: stray ‘\302’ in program
         else if (c == ' ' ¦¦ c == '\n' ¦¦ c == '\t')
         ^
a.c:16:9: error: stray ‘\246’ in program
a.c:16:9: error: stray ‘\302’ in program
a.c:16:9: error: stray ‘\246’ in program
a.c:16:32: error: expected ‘)’ before ‘c’
         else if (c == ' ' ¦¦ c == '\n' ¦¦ c == '\t')
                                ^
a.c:16:32: error: stray ‘\302’ in program
a.c:16:32: error: stray ‘\246’ in program
a.c:16:32: error: stray ‘\302’ in program
a.c:16:32: error: stray ‘\246’ in program

在vi中运行: set list可以看到特殊字符：^I。删除它就好了。