Compilare: user.cpp: In function ‘double dist(int, int)’: user.cpp:50:20: warning: unused variable ‘ld’ [-Wunused-variable] int k=0,ls,ld,i; ^ user.cpp:60:16: warning: unused variable ‘x’ [-Wunused-variable] double x; ^ user.cpp: In function ‘void citeste(long long int&)’: user.cpp:20:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp:26:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:78:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.in","r",stdin); ^ user.cpp:79:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmap.out","w",stdout); ^ user.cpp: In function ‘double dist(int, int)’: user.cpp:50:17: warning: ‘ls’ may be used uninitialized in this function [-Wmaybe-uninitialized] int k=0,ls,ld,i; ^