[C]记录C语言中由于粗心遇到的奇葩错误.

1.

正确代码:

        for( word = strtok( buf, whitespace); word != NULL; word = strtok( NULL, whitespace)) {
            if (strcmp(word,"the" )  == 0  )

错误代码:

        for( word = strtok( buf, whitespace); word != NULL; word = strtok( NULL, whitespace));{
            if (strcmp(word,"the" )  == 0  )

错误原因: 由于多了个分号.所以for循环体中实际执行的代码是 ; 这行空语句, if语句则变成了循环体外,

所以在调用strcmp中,参数word将永远为NULL.