c语言99乘法表正倒三角

以下是C语言中打印九九乘法表正倒三角的代码示例：

正三角靠右：

#include <stdio.h>

int main() {
    int a, n, b;
    printf("正三角靠右：\n\n");
    for (a = 1; a < 10; a++) {
        for (n = 9; n > a; n--) {
            printf("    ");
        }
        for (b = 1; b <= a; b++) {
            printf("%d*%d=%2d\t", a, b, a * b);
        }
        printf("\n");
    }
    return 0;
}

倒三角靠右：

#include <stdio.h>

int main() {
    int a, n, b;
    printf("倒三角靠右：\n\n");
    for (a = 1; a < 10; a++) {
        for (n = 1; n < a; n++) {
            printf("    ");
        }
        for (b = 9; b >= a; b--) {
            printf("%d*%d=%2d\t", a, b, a * b);
        }
        printf("\n");
    }
    return 0;
}

以上代码可以在C语言中打印出九九乘法表的正倒三角形式。
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