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From: brucetsao.bbs@bbs.mgt.ncu.edu.tw (肉腳布)
Newsgroups: tw.bbs.comp.oop
Subject: 6.利用printf函式列印一張九九乘法表
Date: 03 Jan 2007 05:20:01 GMT
Organization: 中央資管龍貓資訊天地
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6.      利用printf函式列印一張九九乘法表
6.      利用printf函式列印一張九九乘法表，其對齊格式如下：
        ×              2               3               4               5               6               7               8               9
        2               4               6               8               10              12              14              16              18
        3               6               9               12              15              18              21              24              27
        4               8               12              16              20              24              28              32              36
        5               10              15              20              25              30              35              40              45
        6               12              18              24              30              36              42              48              54
        7               14              21              28              35              42              49              56              63
        8               16              24              32              40              48              56              64              72
        9               18              27              36              45              54              63              64              81
（提示：使用一個for巢狀迴圈，外圈是2~9，內圈也是2~9。至於對齊的方法可以使用printf函式，並指定列印整數的格式為%3d。）

        #include <stdio.h>
        void main()
        {
                int i,j;
                printf("  x |");
                for (i=2;i<=9;i++) printf("%3d",i);
                printf("\n----+-------------------------\n");
                for (i=2;i<=9;i++)
                {
                        printf("%3d |",i);
                        for (j=2;j<=9;j++)
                                printf("%3d",i*j);
                        printf("\n");
                }
}

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