joc18.cpp: In function 'int main()': joc18.cpp:46: warning: comparison between signed and unsigned integer expressions joc18.cpp:50: warning: comparison between signed and unsigned integer expressions joc18.cpp:60: warning: comparison between signed and unsigned integer expressions joc18.cpp:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result joc18.cpp:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result joc18.cpp:13: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result joc18.cpp:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result joc18.cpp:9: warning: 'poz' may be used uninitialized in this function