g_strdup_printf

g_strdup_printf是glibc下的函数

g_strdup_printf是一个和sprintf差不多的函数，但是 g_strdup_printf更安全和智能，并且在释放的时候也只能用 g_free （至于为什么更安全，我也想知道，有知道的请留言告诉我)  .  g_strdup_printf为分析一段buffer（也不理解)

例子：

#include <stdio.h>
#include <glib.h>

int main() {
    char *a = "aaaaaaaaaaa";
    char *t = g_strdup_printf ("%s", a);
    printf("%s", t);
}

g_strdup_printf ()

gchar *
g_strdup_printf (const gchar *format,
                 ...);

Similar to the standard C sprintf() function but safer, since it calculates the maximum space required and allocates memory to hold the result. The returned string should be freed with g_free() when no longer needed.

Parameters

format	a standard printf() format string, but notice string precision pitfalls
...	the parameters to insert into the format string

Returns

a newly-allocated string holding the result