Compilare: user.cpp: In function ‘void parse_read(int*)’: user.cpp:139:31: warning: unused variable ‘c’ [-Wunused-variable] char cc[buffer_size+1] , *c; ^ user.cpp:141:10: warning: unused variable ‘__flag’ [-Wunused-variable] bool __flag = 0 ; ^ user.cpp: In function ‘int main()’: user.cpp:22:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ksplit.in" , "r" , stdin); ^ user.cpp:24:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:40:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ksplit.out" , "w" , stdout); ^ user.cpp: In function ‘void parse_read(int*)’: user.cpp:172:17: warning: ‘i’ may be used uninitialized in this function [-Wmaybe-uninitialized] while( cc[i] !='\n' && cc[i] ){ ^