题目：要求输出国际象棋棋盘。1.程序分析：用i控制行，j来控制列，根据i+j的和的变化来控制输出黑方格，还是白方格。-Title: requiring the export of international chessboard.Program analysis: control lines, with i, j to the control bar, i+ j and changes to control the output of the black box or white box.