#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;}