Compilare: user.c: In function ‘main’: user.c:28:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (j+1 < m) ^ user.c:32:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (i+1 < n) ^ user.c:12:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp, "%i%i", &n, &m); ^ user.c:21:35: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for (j=0; j<m; ++j) fscanf(fp, "%i", &A[i][j]); ^