C language printing with one-dimensional array Yang Hui triangle (original: accidentally thought)

//Ask for the number of the first 10 rows
1inta[ One] = {1 };2a[0] =1, a[1] =1;3     intI, j,m;4      for(i =2; I <= One; i++)//2-11 output 10 lines5     {    6          for(j = i-1; J >1; j--)//Key in this sentence, backwards beg7         {            8           A[j] = A[j] + a[j-1]; 9printf"%5d", A[j]); Ten         }     Oneprintf"%5d\n", a[0]); A}

Originally a a[j]=a[j]+a[j-1]

Results found calculation a[j+1], not, think of the inverted to beg, just Yang Hui triangle is also about symmetry, the result output meaning is left and right number upside down, but symmetrical, so feasible

// The key is in this sentence, in reverse, using the symmetry of the Yang Hui Triangle

C language printing with one-dimensional array Yang Hui triangle (original: accidentally thought)