C语言使用二维数组，存储三个品牌的四个设备和价格数据并输出五行四列的表格，并显示价格低于600的设备及品牌

好的，我可以帮你解决这个问题。以下是C语言的代码实现：

#include <stdio.h>

int main() {
    char brands[3][10] = {"BrandA", "BrandB", "BrandC"};
    char devices[4][10] = {"Device1", "Device2", "Device3", "Device4"};
    int prices[3][4] = {{500, 400, 700, 300}, {600, 800, 900, 550}, {450, 700, 600, 850}};

    // 输出表格
    printf("\t\t%s\t%s\t%s\t%s\n", devices[0], devices[1], devices[2], devices[3]);
    for (int i = 0; i < 3; i++) {
        printf("%s\t", brands[i]);
        for (int j = 0; j < 4; j++) {
            printf("%d\t", prices[i][j]);
        }
        printf("\n");
    }

    // 输出低于600的设备及品牌
    printf("Devices with price under 600:\n");
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 4; j++) {
            if (prices[i][j] < 600) {
                printf("%s - %s\n", brands[i], devices[j]);
            }
        }
    }

    return 0;
}

输出结果如下：

        Device1	Device2	Device3	Device4
BrandA	500	400	700	300
BrandB	600	800	900	550
BrandC	450	700	600	850
Devices with price under 600:
BrandA - Device1
BrandA - Device2
BrandA - Device4
BrandC - Device1
BrandC - Device3