Compilare: main.cpp:15:7: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main() ^ main.cpp: In function 'int main()': main.cpp:20:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 0;i < n; i++) ^~~ main.cpp:23:8: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' long double rez ; ^~~~ main.cpp:28:50: warning: 'rez' may be used uninitialized in this function [-Wmaybe-uninitialized] out <<fixed<<setprecision(6)<< fabs(rez / 2.0) ; ^