How can i get the numerical value (convert it to int) from a string?

Question

I only see strings with only numbers. this is my string. SMUL 9 AB How can I get the number 9 as int type. Other possible string may be: SMUL 13 AB SMUL 43 100 21

Answer 1

尝试atoi的运气

Answer 2

您可以使用atoi库函数：

   int atoi(const char *nptr);

Answer 3

atoi is bad, there is no error-handling, eg: atoi("0")==atoi("foobar") ! use strtol or sscanf instead.