Compilare: user.cpp: In function ‘int main()’: user.cpp:27:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘LD* {aka long double*}’ [-Wformat=] scanf("%d%d", &a, &b); ^ user.cpp:27:29: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘LD* {aka long double*}’ [-Wformat=] user.cpp:35:41: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘LD* {aka long double*}’ [-Wformat=] scanf("%d%d%d%d", &a, &b, &x, &y); ^ user.cpp:35:41: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘LD* {aka long double*}’ [-Wformat=] user.cpp:35:41: warning: format ‘%d’ expects argument of type ‘int*’, but argument 4 has type ‘LD* {aka long double*}’ [-Wformat=] user.cpp:35:41: warning: format ‘%d’ expects argument of type ‘int*’, but argument 5 has type ‘LD* {aka long double*}’ [-Wformat=] user.cpp:20:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nn.in", "rt", stdin); ^ user.cpp:21:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nn.out", "wt", stdout); ^ user.cpp:24:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &q); ^ user.cpp:27:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^ user.cpp:35:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &a, &b, &x, &y); ^