Compilare: main.cpp: In function 'int main()': main.cpp:68:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < crdX.size(); ++i) ~~^~~~~~~~~~~~~ main.cpp:69:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < crdY.size(); ++j) ~~^~~~~~~~~~~~~ main.cpp:70:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 1; k < crdZ.size(); ++k) { ~~^~~~~~~~~~~~~ main.cpp:14:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("paralelipiped.in", "r", stdin); ^ main.cpp:15:43: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("paralelipiped.out", "w", stdout); ^