extern unsigned long long strtoull(const char *ptr, char **end, int base);\r
extern unsigned long strtoul(const char *ptr, char **end, int base);\r
extern int atoi(const char *ptr);\r
+\r
+extern double strtod(const char *ptr, char **end);\r
+extern float strtof(const char *ptr, char **end);\r
+extern float atof(const char *ptr);\r
+\r
extern void exit(int status) __attribute__((noreturn));\r
extern void abort(void);\r
extern void atexit(void (*__func)(void));\r