Compilare: main.c: In function 'main': main.c:41:10: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] for (fscanf(f, "%d", &t); t; t--){ ^~~~~~~~~~~~~~~~~~~ main.c:45:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~ main.c:65:17: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &A[i][j]); ^~~~~~~~~~~~~~~~~~~~~~~~~