Eroare de compilare: user.c: In function ‘back’: user.c:11:5: warning: implicit declaration of function ‘calloc’ [-Wimplicit-function-declaration] int **mat = calloc(n, sizeof(int*)); ^ user.c:11:17: warning: incompatible implicit declaration of built-in function ‘calloc’ [enabled by default] int **mat = calloc(n, sizeof(int*)); ^ user.c:40:56: error: expected ‘)’ before ‘;’ token (i < l - 1 ? printf("%d ", k[i]) : printf("%d", k[i]); ^ user.c:41:1: error: expected ‘;’ before ‘}’ token } ^ user.c: In function ‘main’: user.c:47:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.in", "r", stdin); ^ user.c:48:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.out", "w", stdout); ^ user.c:50:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &M, &N); ^ user.c:52:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.c:54:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b[i]); ^