int arr[][3] = { {23,3,3},{34,76,78},{5,6,5} }; printf("arr行:%d\n", sizeof(arr)/sizeof(arr[0])); printf("arr列:%d\n", sizeof(arr[0]) / sizeof(arr[0][0]));
二维数组.
原文：https://www.cnblogs.com/mayichen0823/p/10162258.html
