Eroare de compilare: main.cpp: In function 'int main()': main.cpp:9:2: error: 'ifstream' was not declared in this scope; did you mean 'std::ifstream'? 9 | ifstream fin("pascal.in"); | ^~~~~~~~ | std::ifstream In file included from /usr/include/c++/10/ios:38, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/fstream:38, from main.cpp:2: /usr/include/c++/10/iosfwd:162:34: note: 'std::ifstream' declared here 162 | typedef basic_ifstream<char> ifstream; | ^~~~~~~~ main.cpp:10:2: error: 'ofstream' was not declared in this scope; did you mean 'std::ofstream'? 10 | ofstream fout("pascal.out"); | ^~~~~~~~ | std::ofstream In file included from /usr/include/c++/10/ios:38, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/fstream:38, from main.cpp:2: /usr/include/c++/10/iosfwd:165:34: note: 'std::ofstream' declared here 165 | typedef basic_ofstream<char> ofstream; | ^~~~~~~~ main.cpp:13:5: error: 'fin' was not declared in this scope 13 | fin>>R; | ^~~ main.cpp:36:5: error: 'fout' was not declared in this scope 36 | fout<<(R%2==0 ? (nr*2-1) :nr*2); | ^~~~ Non zero exit status: 1