Compilare: user.cpp: In member function ‘Huge Huge::operator+(int)’: user.cpp:70:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < cifre.size(); i++) { ^ user.cpp: In member function ‘Huge Huge::operator+(Huge)’: user.cpp:86:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < max(cifre.size(), B.cifre.size()); i++) { ^ user.cpp:87:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i >= cifre.size()) a = 0; ^ user.cpp:89:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i >= B.cifre.size()) b = 0; ^ user.cpp: In function ‘int main()’: user.cpp:121:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(inputFile.c_str(), "r", stdin); ^ user.cpp:122:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(outputFile.c_str(), "w", stdout); ^ user.cpp:125:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &K); ^ user.cpp:128:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^