/in/foo.cc:4:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable : 4996)
 
/in/foo.cc: In function 'int main()':
/in/foo.cc:17:21: error: 'itoa' was not declared in this scope
     *itoa(num, c, 10);//整数转字符串
                     ^
/in/foo.cc:18:17: error: 'strlen' was not declared in this scope
     n = strlen(c);
                 ^