Compilare: user.cpp: In function ‘int main()’: user.cpp:48:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.in","r",stdin); ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("stalpi3.out","w",stdout); ^ user.cpp:51:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&d); ^ user.cpp:55:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&s1[i].dis,&s1[i].cul); ^ user.cpp:62:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&s2[i].dis,&s2[i].cul); ^ user.cpp: In function ‘double bs(int, int)’: user.cpp:34:66: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] ans1=sqrt((double)d*d+(s1[arg].dis-s2[last].dis)*(s1[arg].dis-s2[last].dis)); ^ user.cpp: In function ‘int main()’: user.cpp:90:12: warning: ‘y’ may be used uninitialized in this function [-Wmaybe-uninitialized] soly[i]=y; ^ user.cpp:89:12: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] solx[i]=x; ^