#include
int printf();格式化输出
int scanf();格式化输入
int sprintf()格式化输出到字符串
FILE *fopen()
size_t fread()
size_t fwrite()
int fseek();
int fclose();
#include
int atoi()
double atof()
long int strtol()
void *malloc()
void free()
void *realloc()
int rand()
void srand()
#include
char *strcpy()
size_t strlen()
char *strcat()
int strcmp()
char *strncpy()
char *strrchr()
void *memset()
void *memcpy()
#include
time_t time()
struct tm *localtime()
double sin();
double asin();
double log()
double pow();
#include