Pascal's Triangle II

问题：输出杨辉三角的第n行

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class Solution { public:     vector<int> getRow(int rowIndex) {         vector<int> vec;         int a[100][100];         a[0][0]=1;         int j,i;         for(i=1;i<=rowIndex;i++)         {             a[i][0]=1;             for(j=1;j<i;j++)             {                 a[i][j]=a[i-1][j-1]+a[i-1][j];             }             a[i][j]=1;         }         for(i=0;i<=rowIndex;i++) vec.push_back(a[rowIndex][i]);         return vec;     } };