Array de arrays

[leosansan]

Si no he entendido mal esta es la salida que buscas:

abcdefghijklmnopqrstuvwxyz
babbbcbdbebfbgbhbibjbkblbmbnbobpbqbrbsbtbubvbwbxby bz
cacbcccdcecfcgchcicjckclcmcncocpcqcrcsctcucvcwcxcy cz
dadbdcdddedfdgdhdidjdkdldmdndodpdqdrdsdtdudvdwdxdy dz
eaebecedeeefegeheiejekelemeneoepeqereseteuevewexey ez
fafbfcfdfefffgfhfifjfkflfmfnfofpfqfrfsftfufvfwfxfy fz
gagbgcgdgegfggghgigjgkglgmgngogpgqgrgsgtgugvgwgxgy gz
hahbhchdhehfhghhhihjhkhlhmhnhohphqhrhshthuhvhwhxhy hz
iaibicidieifigihiiijikiliminioipiqirisitiuiviwixiy iz
jajbjcjdjejfjgjhjijjjkjljmjnjojpjqjrjsjtjujvjwjxjy jz
kakbkckdkekfkgkhkikjkkklkmknkokpkqkrksktkukvkwkxky kz
lalblcldlelflglhliljlklllmlnlolplqlrlsltlulvlwlxly lz
mambmcmdmemfmgmhmimjmkmlmmmnmompmqmrmsmtmumvmwmxmy mz
nanbncndnenfngnhninjnknlnmnnnonpnqnrnsntnunvnwnxny nz
oaobocodoeofogohoiojokolomonooopoqorosotouovowoxoy oz
papbpcpdpepfpgphpipjpkplpmpnpopppqprpsptpupvpwpxpy pz
qaqbqcqdqeqfqgqhqiqjqkqlqmqnqoqpqqqrqsqtquqvqwqxqy qz
rarbrcrdrerfrgrhrirjrkrlrmrnrorprqrrrsrtrurvrwrxry rz
sasbscsdsesfsgshsisjskslsmsnsospsqsrssstsusvswsxsy sz
tatbtctdtetftgthtitjtktltmtntotptqtrtstttutvtwtxty tz
uaubucudueufuguhuiujukulumunuoupuqurusutuuuvuwuxuy uz
vavbvcvdvevfvgvhvivjvkvlvmvnvovpvqvrvsvtvuvvvwvxvy vz
wawbwcwdwewfwgwhwiwjwkwlwmwnwowpwqwrwswtwuwvwwwxwy wz
xaxbxcxdxexfxgxhxixjxkxlxmxnxoxpxqxrxsxtxuxvxwxxxy xz
yaybycydyeyfygyhyiyjykylymynyoypyqyrysytyuyvywyxyy yz
zazbzczdzezfzgzhzizjzkzlzmznzozpzqzrzsztzuzvzwzxzy zz

Código C++:

#include <stdio.h>
 
int main(){
  char a[26][26][3];
  int i,j;
  for (i=0;i<26 ;i++ ){
    for (j=0;j<26 ;j++ ){
      if (i==0 ){
      a[i][j][0] =97+j;
      a[i][j][1] ='\0';
      a[i][j][2] ='\0';
      }
      else {
        a[i][j][0] =97+i;
        a[i][j][1] =97+j%26;
        a[i][j][2] ='\0';
      }
    }
  }
  for (i=0;i<26 ;i++ ){
    for (j=0;j<26 ;j++ )
         printf("%s",a[i][j]);
    putchar ('\n');
  }
  return 0;
}
 

¡¡¡Saluditos!!!