Compilare: main.cpp: In function 'int main()': main.cpp:67:8: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(nr!=0) ^~ main.cpp:69:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' fout<<a-sum<<"\n"; ^~~~