Compilare: user.cpp: In function ‘int main()’: user.cpp:38:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:40:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.cpp: In function ‘int sdo(int, int)’: user.cpp:7:10: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] int aux=a; ^ user.cpp:12:18: note: ‘a’ was declared here int st,dr,i,j,p,a; ^