Compilare: main.cpp: In function 'int main()': main.cpp:100:25: warning: 'sec2' may be used uninitialized in this function [-Wmaybe-uninitialized] time=time_in_seconds+ sec-sec2; ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:99:41: warning: 'min2' may be used uninitialized in this function [-Wmaybe-uninitialized] time_in_seconds=(min-min2) *60+ (hour-hour2)*3600; ~~~~^~~~~~ main.cpp:99:58: warning: 'hour2' may be used uninitialized in this function [-Wmaybe-uninitialized] time_in_seconds=(min-min2) *60+ (hour-hour2)*3600; ~~~~~^~~~~~~