Eroare de compilare: user.cpp:12:13: error: ‘int y1’ redeclared as different kind of symbol int x1, x2, y1, y2; ^ In file included from /usr/include/features.h:357:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/os_defines.h:39, from /usr/include/i386-linux-gnu/c++/4.8/bits/c++config.h:420, from /usr/include/c++/4.8/iosfwd:38, from /usr/include/c++/4.8/ios:38, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:243:1: error: previous declaration of ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < strlen(s); j++) ^ user.cpp:58:28: error: assignment of function ‘double y1(double)’ y1 = i; ^ user.cpp:58:28: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:69:22: error: invalid conversion from ‘double (*)(double)throw ()’ to ‘int’ [-fpermissive] for (int j = y1; j <= y2; j++) ^