Compilare: main.cpp: In function 'int main()': main.cpp:50:24: warning: unused variable 'e' [-Wunused-variable] int d, i, sum, nn, e, e1, ncf, cf; ^ main.cpp:50:27: warning: unused variable 'e1' [-Wunused-variable] int d, i, sum, nn, e, e1, ncf, cf; ^~ main.cpp:47:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("sumall.in", "r", stdin); ^ main.cpp:48:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ("sumall.out", "w", stdout); ^ main.cpp:58:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%lld", &n); ^