Compilare: user.c: In function ‘main’: user.c:64:28: warning: statement with no effect [-Wunused-value] a[i][j]=='.'; ^ user.c:35:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&a[i][j]); ^ user.c:41:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"\n"); ^