Compilare: main.c: In function 'main': main.c:45:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:48:22: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] for(k=0; k<m; k++) fscanf(in, "%d", &matrice[i][k]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~