程序代码：

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#pragma warning(suppress : 4996)
int main()
{
    char Getstrings[90] = "helo" ;
    char Getstringf[] = "world." ;
    strncat(Getstrings,Getstringf,9);
    //puts(Getstrings);
    printf("%s\n",Getstrings);
    return 0;
}