Compilare: user.cpp: In function ‘int main()’: user.cpp:39:75: warning: operation on ‘k’ may be undefined [-Wsequence-point] d[k]=double(a[i]-a[j])/(b[j]-b[i]),o[k]=b[i]<b[j]?i:j,q[k]=i+j-o[k++]; ^ user.cpp:33:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:33:24: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:33:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:35:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a[i],&b[i]),p[i]=i; ^ user.cpp:41:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x[i],&y[i],&z[i]),w[i]=i; ^