Borderou de evaluare (job #548891)

Eroare de compilare: user.cpp:4:16: error: ‘int y1’ redeclared as different kind of symbol /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ user.cpp: In function ‘int main()’: user.cpp:23:5: error: assignment of function ‘double y1(double)’ user.cpp:23:5: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:24:12: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] user.cpp:26:15: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] user.cpp:27:19: error: invalid operands of types ‘int’ and ‘double(double)throw ()’ to binary ‘operator-’ user.cpp:29:19: warning: pointer to a function used in arithmetic [-Wpointer-arith] user.cpp:29:19: error: assignment of function ‘double y1(double)’ user.cpp:29:19: error: cannot convert ‘double (*)(double)throw ()’ to ‘double(double)throw ()’ in assignment