Compilare: user.cpp: In function ‘int main()’: user.cpp:52:9: warning: unused variable ‘s1’ [-Wunused-variable] int s1,s2,med,cst=(k+1)>>1; ^ user.cpp:52:12: warning: unused variable ‘s2’ [-Wunused-variable] int s1,s2,med,cst=(k+1)>>1; ^ user.cpp: In member function ‘void myifstream::advance()’: user.cpp:38:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input); ^ user.cpp: In constructor ‘myifstream::myifstream(const char*)’: user.cpp:14:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input); ^