Compilare: user.cpp: In function ‘int lee(int, int)’: user.cpp:28:15: warning: unused variable ‘p1’ [-Wunused-variable] int u = 1,p1, ac[128][128]; ^ user.cpp: In function ‘int main()’: user.cpp:81:25: warning: format ‘%c’ expects argument of type ‘char*’, but argument 2 has type ‘int’ [-Wformat=] scanf("%c",x); ^ user.cpp:73:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.in","r",stdin); ^ user.cpp:74:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("insule.out","w",stdout); ^ user.cpp:75:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:81:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",x); ^ user.cpp:84:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^