Compilare: user.c: In function ‘main’: user.c:51:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &n,&m); ^ user.c:55:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &h[i][j]); ^ user.c:47:42: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, m, i, j, pos, pasi, lin, col, val, max; ^