如下所示：

INPUT = c_int * 4# 实例化一个长度为2的整型数组input = INPUT()# 为数组赋值（input这个数组是不支持迭代的）input[0] = 11input[1] = 2input[2] = 3input[3] = 4dll.teststring.restype = c_char_p# bytes(aaaa, encoding="utf-8")a = dll.teststring(input,4)MYLIBDLL char* teststring(int* plus1, int len);char* teststring(int* plus1,int len) { for (int i = 0; i < len; i++) { printf("%d \n", plus1[i]); } Mat mat; //加载图片 mat = imread("bgs.jpg", CV_LOAD_IMAGE_COLOR); printf("a %d %d", mat.rows, mat.cols); //if (!mat.empty()) { int m, n; n = mat.cols * 3; m = mat.rows; unsigned char *data = (unsigned char*)malloc(sizeof(unsigned char) * m * n); int p = 0; for (int i = 0; i < m; i++) { for (int j = 0; j < n; j++) { data[p] = mat.at<unsigned char>(i, j); p++; } } *plus1 = p; return (char*)data;}

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