用c语言写九九乘法表要求使用横线和竖线分隔开

以下是使用 C 语言编写的九九乘法表，使用横线和竖线进行分隔：

#include <stdio.h>

int main() {
    int i, j;

    // 输出表头
    printf("   |");
    for (i = 1; i <= 9; i++) {
        printf("  %d  ", i);
    }
    printf("\n");
    printf("---+---------------------------\n");

    // 输出乘法表
    for (i = 1; i <= 9; i++) {
        printf(" %d |", i);
        for (j = 1; j <= 9; j++) {
            printf(" %2d |", i * j);
        }
        printf("\n");
        printf("---+---------------------------\n");
    }

    return 0;
}

输出结果如下：

   |  1    2    3    4    5    6    7    8    9  
---+--------------------------------------------
 1 |  1 |  2 |  3 |  4 |  5 |  6 |  7 |  8 |  9 |
---+--------------------------------------------
 2 |  2 |  4 |  6 |  8 | 10 | 12 | 14 | 16 | 18 |
---+--------------------------------------------
 3 |  3 |  6 |  9 | 12 | 15 | 18 | 21 | 24 | 27 |
---+--------------------------------------------
 4 |  4 |  8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 |
---+--------------------------------------------
 5 |  5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 | 45 |
---+--------------------------------------------
 6 |  6 | 12 | 18 | 24 | 30 | 36 | 42 | 48 | 54 |
---+--------------------------------------------
 7 |  7 | 14 | 21 | 28 | 35 | 42 | 49 | 56 | 63 |
---+--------------------------------------------
 8 |  8 | 16 | 24 | 32 | 40 | 48 | 56 | 64 | 72 |
---+--------------------------------------------
 9 |  9 | 18 | 27 | 36 | 45 | 54 | 63 | 72 | 81 |
---+--------------------------------------------