Eroare de compilare: user.c:1:19: error: fstream: No such file or directory user.c:2:16: error: math: No such file or directory user.c:3:20: error: iostream: No such file or directory user.c: In function 'sortv': user.c:24: warning: unused variable 'j' user.c: In function 'main': user.c:45: error: 'ifstream' undeclared (first use in this function) user.c:45: error: (Each undeclared identifier is reported only once user.c:45: error: for each function it appears in.) user.c:45: error: expected ';' before 'f' user.c:46: error: 'ofstream' undeclared (first use in this function) user.c:46: error: expected ';' before 'g' user.c:47: error: 'f' undeclared (first use in this function) user.c:62: warning: implicit declaration of function 'pow' user.c:62: warning: incompatible implicit declaration of built-in function 'pow' user.c:75: error: 'g' undeclared (first use in this function) user.c:75: error: 'endl' undeclared (first use in this function)