Compilare: user.cpp: In function ‘void printOutputArray()’: user.cpp:40:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sizeof(output)/sizeof(output[0]); i++) { ^ user.cpp: In function ‘void writeToFile()’: user.cpp:74:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sizeof(output) / sizeof(output[0]); i++) { ^