Compilare: user.c: In function ‘main’: user.c:17:13: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘char *’ [-Wformat=] fscanf(fin, "%d", &a[i][j]); ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:17:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i][j]); ^