bzero

原型：
extern void bzero(void *s, int n);

用法：
#include <string.h>

功能：置字节字符串s的前n个字节为零。    
说明：bzero无返回值。    
举例：// bzero.c            
       #include <syslib.h>
       #include <string.h>
       int main()
       {
                struct
                {
                      int a;
                      char s[5];
                      float f;
                } tt;
                char s[20];
                bzero(&tt,sizeof(tt));   // struct initialization to zero       bzero(s,20);
                clrscr();
                printf("Initail Success");
                getchar();
                return 0;
        }