Spájanie reťazcov – C / C++ – Fórum – Programujte.com

Zdravím, prosím vás v tomto príklade by som chcel aby sa mi spojili reťazce, ale nejako mi to nejde..
Viem, že sa to dá cez cstring,ale chcem pochopiť princip.

#include <iostream>

#include <cstring>

using namespace std;

int main()

{

    char *a=new char[2];

    char *b=new char[4];

    strncpy(a,"lt",2);

    strncpy(b,"name",4);

    int MAX=strlen(a) + strlen(b);

    char *c=new char[MAX];

    cout << "Pocet znakov: " << MAX <<endl;

    for(int i=0;i<MAX;i++)

    {

                  if (i<strlen(a)) c[i]=a[i];

                  else c[i]=b[i];

                  }  

    cout << c << endl;

    cout << *(c+9);

    delete []a;

    delete []b;

    delete []c;

      return 0;

}

ten for je tam akísi divoky... ja osobne by som to riesil takto:

#include <iostream>

#include <cstring>

using namespace std;



int main()

{

   char *a=new char[2];

   char *b=new char[4];



   strncpy(a,"lt",2);

   strncpy(b,"name",4);

   int MAX=strlen(a) + strlen(b);

   char *c=new char[MAX];

   cout << "Pocet znakov: " << MAX <<endl;



   memcpy(c, a, strlen(a));

   memcpy(c+strlen(a), b, strlen(b));





   delete []a;

   delete []b;

   delete []c;

   return 0;

}

#include <iostream>

#include <cstring>

using namespace std;



int main()

{

   char *a=new char[2];

   char *b=new char[4];

   int i;



   strncpy(a,"lt",2);

   strncpy(b,"name",4);

   int MAX=strlen(a) + strlen(b);

   char *c=new char[MAX];

   cout << "Pocet znakov: " << MAX <<endl;



   for(i = 0; i <strlen(a); i++) {

      c[i] = a[i];

   }



   for(i = 0; i < strlen(b); i++) {

      c[strlen(a) + i] = b[i];

   }



   delete []a;

   delete []b;

   delete []c;

   return 0;

}

To sn3d: ide to diky, len prosím ťa nevieš mi vysvetliť prečo nefungovalo to moje a stále mi prepisovalo reťazec?

To Dodiq:

    for(int i=0;i<MAX;i++)

    {

                  if (i<strlen(a)) c[i]=a[i];

                  else c[i]=b[i];

                  }  

int delkaA = strlen(a),delkaB = strlen(b); // nac zatezovat procesor v kazdem pruchodu cyklem pouzitim funkce

...// v podstate to co tam mas :)

for(i=0;i<MAX;i++)

   c[i] = ((i<delkaA) ? a[i]:b[(i-delkaA)]);

To insider: Ďakujem, pomohol si.