Eroare de compilare: user.cpp: In function ‘void rezolva1()’: user.cpp:31:23: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] y=1<<k-1; ^ user.cpp: In function ‘int main()’: user.cpp:120:38: error: invalid user-defined conversion from ‘std::ifstream {aka std::basic_ifstream<char>}’ to ‘FILE* {aka _IO_FILE*}’ [-fpermissive] fscanf(fin,"%d%d%d",&ct,&n,&k); ^ In file included from /usr/include/c++/4.8/ios:44:0, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/basic_ios.h:115:7: note: candidate is: std::basic_ios<_CharT, _Traits>::operator void*() const [with _CharT = char; _Traits = std::char_traits<char>] <near match> operator void*() const ^ /usr/include/c++/4.8/bits/basic_ios.h:115:7: note: no known conversion for implicit ‘this’ parameter from ‘void*’ to ‘FILE* {aka _IO_FILE*}’ user.cpp:122:34: error: invalid user-defined conversion from ‘std::ifstream {aka std::basic_ifstream<char>}’ to ‘FILE* {aka _IO_FILE*}’ [-fpermissive] fscanf(fin,"%d",&v[i]); ^ In file included from /usr/include/c++/4.8/ios:44:0, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/basic_ios.h:115:7: note: candidate is: std::basic_ios<_CharT, _Traits>::operator void*() const [with _CharT = char; _Traits = std::char_traits<char>] <near match> operator void*() const ^ /usr/include/c++/4.8/bits/basic_ios.h:115:7: note: no known conversion for implicit ‘this’ parameter from ‘void*’ to ‘FILE* {aka _IO_FILE*}’ user.cpp:130:24: warning: unused variable ‘l’ [-Wunused-variable] int u[33],nr,p,l,r; ^ user.cpp:120:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&ct,&n,&k); ^ user.cpp:122:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^