Compilare: user.cpp: In function ‘int main()’: user.cpp:56:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < cadran[1].size(); j++) ^ user.cpp:57:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[3].size(); k++) ^ user.cpp:62:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < cadran[3].size(); j++) ^ user.cpp:63:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[1].size(); k++) ^ user.cpp:68:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < cadran[2].size(); j++) ^ user.cpp:69:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[4].size(); k++) ^ user.cpp:74:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < cadran[4].size(); j++) ^ user.cpp:75:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[2].size(); k++) ^ user.cpp:80:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i+1; j < cadran[0].size(); j++) ^ user.cpp:82:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[cad].size(); k++) ^ user.cpp:86:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cadran[0].size(); i++) ^ user.cpp:89:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cadran[cad1].size(); j++) ^ user.cpp:90:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[cad2].size(); k++) ^ user.cpp:97:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cadran[cad1].size(); i++) ^ user.cpp:98:59: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < cadran[cad2].size(); j++) ^ user.cpp:99:63: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < cadran[cad3].size(); k++) ^ user.cpp:31:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]