UIT 8.10

#include <iostream>
#include <string>
using namespace std;
#define MAX 255

int myStrlen(char s[]);
bool myStrcat(char s1[], char s2[]);

int main()
{
    char s1[MAX], s2[MAX];
    gets(s1);
    gets(s2);
    bool kt = myStrcat(s1, s2);
    if (!kt) cout << "Khong noi duoc. Khong du bo nho.";
    else cout << s1;
    return 0;
}

bool myStrcat(char s1[], char s2[])
{
    int len1 = 0, len2 = 0;
    while (s1[len1]!='\0') len1++;
    while (s2[len2]!='\0') len2++;
    if (len1+len2>254) return 0;
    s1[len1] = ' ';
    for(int i=0; i<len2; i++) s1[len1 + i + 1] = s2[i];
    return true;
}