Compilare: user.cpp: In function ‘int main()’: user.cpp:130: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:131: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:133: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:137: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void zi1(int, int, int, int, int)’: user.cpp:17: warning: ‘igrec’ may be used uninitialized in this function user.cpp: In function ‘void zi2(int, int, int, int, int)’: user.cpp:45: warning: ‘igrec’ may be used uninitialized in this function user.cpp: In function ‘void zi3(int, int, int, int, int)’: user.cpp:73: warning: ‘igrec’ may be used uninitialized in this function user.cpp: In function ‘void zi4(int, int, int, int, int)’: user.cpp:101: warning: ‘igrec’ may be used uninitialized in this function