Eroare de compilare: main.cpp:4:1: error: 'ifstream' does not name a type ifstream f("dreptunghi.in"); ^~~~~~~~ main.cpp:5:1: error: 'ofstream' does not name a type ofstream g("dreptunghi.out"); ^~~~~~~~ main.cpp: In function 'int main()': main.cpp:19:5: error: 'f' was not declared in this scope f>>x>>y; ^ main.cpp:20:5: error: 'g' was not declared in this scope g<<ext(x, y); ^ Non zero exit status: 1