chibrituri.cpp: In function 'int main()': chibrituri.cpp:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result chibrituri.cpp:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result chibrituri.cpp:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result chibrituri.cpp:10: warning: 'h1' may be used uninitialized in this function chibrituri.cpp:10: warning: 'h2' may be used uninitialized in this function chibrituri.cpp:10: warning: 'h3' may be used uninitialized in this function chibrituri.cpp:10: warning: 'h4' may be used uninitialized in this function chibrituri.cpp:10: warning: 'm1' may be used uninitialized in this function chibrituri.cpp:10: warning: 'm2' may be used uninitialized in this function chibrituri.cpp:10: warning: 'm3' may be used uninitialized in this function chibrituri.cpp:10: warning: 'm4' may be used uninitialized in this function