Compilare: user.cpp: In function ‘int main()’: user.cpp:14:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d", &n); ^ user.cpp:18:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &x, &y); ^ user.cpp:65:68: warning: ‘lenmax2’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fo,"%d %d %d", sum+smax2, stmax2+lenmax2, n-lenmax2); ^ user.cpp:65:68: warning: ‘stmax2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:39:23: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] stmax=st+1; ^