Compilare: user.c: In function ‘main’: user.c:6:53: warning: unused variable ‘b’ [-Wunused-variable] int M, N, K, country, length, width, i, j, x, y, a, b; ^ user.c:6:50: warning: unused variable ‘a’ [-Wunused-variable] int M, N, K, country, length, width, i, j, x, y, a, b; ^ user.c:13:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &M); ^ user.c:14:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:18:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d ", &moonMap[i][j]); ^ user.c:21:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &K); ^ user.c:25:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &country); ^ user.c:26:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &length); ^ user.c:27:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &width); ^