strncat()的用法.
#include <stdio.h>
#include <windows.h>
int main()
{ /*strncat的用法extern char *strncat(char *dest,char *src,int n);
将src所指字符串的n个字符填加到dest所指的字符串尾部*/
char d[20]="abcd";
char *p="efgh";
system("cls");
strncat(d,p,4);
printf("%s\n",d);
return 0;
}