Compilare: user.cpp: In function ‘int main()’: user.cpp:128: warning: format ‘%s’ expects type ‘char*’, but argument 2 has type ‘char (*)[256]’ user.cpp:121: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:122: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:125: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:128: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void equation(char*)’: user.cpp:14: warning: ‘poz’ may be used uninitialized in this function