Compilare: user.cpp: In function ‘int main()’: user.cpp:7:18: warning: unused variable ‘op’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:7:22: warning: unused variable ‘num’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:7:31: warning: unused variable ‘search’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:7:48: warning: unused variable ‘certain’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:7:57: warning: unused variable ‘step’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:7:63: warning: unused variable ‘j’ [-Wunused-variable] int *AIB, m, n, op, num, cp, search, max = 1, certain, step, j, sum, a, b, max_elem = 0; ^ user.cpp:9:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ben.in", "r", stdin); ^ user.cpp:10:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ben.out", "w", stdout); ^ user.cpp:16:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:18:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^