unific.cpp: In function 'int main()': unific.cpp:29: warning: format '%s' expects type 'char*', but argument 3 has type 'char (*)[19]' unific.cpp:36: warning: format '%s' expects type 'char*', but argument 2 has type 'char (*)[20]' unific.cpp:27: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result unific.cpp:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result unific.cpp:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result unific.cpp:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result unific.cpp:66: warning: 'cifra' may be used uninitialized in this function