ABCDEFGHIJKLM*NOPQRSTUVWXYZ
 BCDEFGHIJKLM*NOPQRSTUVWXY
  CDEFGHIJKLM*NOPQRSTUVWX
   DEFGHIJKLM*NOPQRSTUVW
    EFGHIJKLM*NOPQRSTUV
     FGHIJKLM*NOPQRSTU
      GHIJKLM*NOPQRST
       HIJKLM*NOPQRS
        IJKLM*NOPQR
         JKLM*NOPQ
          KLM*NOP
           LM*NO
            M*N
             *

#include <iostream>

int main()
{
    char *p="ABCDEFGHIJKLM*NOPQRSTUVWXYZ";
    int i,j,k;
    k=(int)strlen(p)/2;
    for(i=0;i<=k;i++)
    {
        for(j=0;j<=i-1;j++) printf("%c",' ');
        for(;j<(int)strlen(p)-i;j++) printf("%c",p[j]);
        printf("\n");
    }
    return 0;
}

  我的笨办法：
    for (i = 0; i < 14; i ++)
    {
        for(j=0;j<=i-1;j++) printf(" ");
        a = 'A' + i;
        cnt = 13 - i;
        for (j = 0; j < cnt ; j ++)
        {
            tmpc = a + j;
            putchar(tmpc);
        }
        tmpc = a + 1;
        printf("*");
        for (j = 0; j < cnt ; j ++)
        {
            tmpc = a + 13+j;
            putchar(tmpc);
        }
        printf("\n");
    }

是对的， 你太有才了，谢谢啊！！！！