尤其是前三行,能画个图吗?谢谢啦
int** generate(int numRows, int* returnSize, int** returnColumnSizes){
int **res = (int**)malloc(sizeof(int*) * numRows);
*returnSize = numRows;
*returnColumnSizes = (int*)malloc(sizeof(int) * numRows);
for(int i=0; i < numRows; i++){
res[i] = (int*)malloc(sizeof(int) * (i+1));
(*returnColumnSizes)[i] = i+1;
res[i][0] = 1; //每行第一个和最后一个元素为1
res[i][i] = 1;
for(int j=1; j < i; j++){
res[i][j] = res[i-1][j] + res[i-1][j-1]; //杨辉三角的性质
}
}
return res;
}