Compilare: user.cpp: In function ‘int main(int, char**)’: user.cpp:26:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int e = 0; e < sums.size(); ++e) { ^ user.cpp:24:9: warning: unused variable ‘s’ [-Wunused-variable] int s = 0, e = 0, c = 0, sum = 0; ^ user.cpp:24:16: warning: unused variable ‘e’ [-Wunused-variable] int s = 0, e = 0, c = 0, sum = 0; ^ user.cpp:24:30: warning: unused variable ‘sum’ [-Wunused-variable] int s = 0, e = 0, c = 0, sum = 0; ^