Compilare: user.cpp: In function ‘int main()’: user.cpp:32:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:33:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1;i<=n;i++)fscanf(f,"%d",&A[i]); ^ user.cpp: In function ‘int caut(int)’: user.cpp:26:8: warning: ‘r’ may be used uninitialized in this function [-Wmaybe-uninitialized] return r; ^