Function equivalent to sprintf() with maximum number of characters to be copied?

Question

function(char* name)
{       
   char sql[50];
   sprintf(sql, "select %s;", name);
}

What's the best way to make sure only 50 chars of name are copied to sql in the case name is larger than what sql can hold? (sprintf with a N parameter?)

Thank You.

Answer 1

有snprintf ，它也有一个size参数：

int snprintf(char *str, size_t size, const char *format, ...);

Answer 2

snprintf ，但是如果您打印N个字符，则它不会为null终止。

Answer 3

大多数编译器都有一个snprintf（）函数。

Answer 4

您需要snprintf（）。

int snprintf(char *str, size_t size, const char *format, ...);