Compilare: user.cpp: In function ‘void comb()’: user.cpp:46:19: warning: unused variable ‘n’ [-Wunused-variable] int lung=l-m, n=1, k1=1, k2=1; ^ user.cpp:46:24: warning: unused variable ‘k1’ [-Wunused-variable] int lung=l-m, n=1, k1=1, k2=1; ^ user.cpp:46:30: warning: unused variable ‘k2’ [-Wunused-variable] int lung=l-m, n=1, k1=1, k2=1; ^ user.cpp: In function ‘int main()’: user.cpp:66:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spion.in", "r", stdin); ^ user.cpp:67:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("spion.out", "w", stdout); ^ user.cpp:69:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &p); ^ user.cpp:70:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^