Compilare: user.cpp: In function ‘int main()’: user.cpp:11:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &n); ^ user.cpp:13:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &v[i]); ^ user.cpp:32:50: warning: ‘op’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fo, "%d %d %d\n", min, in+1, op+1); ^ user.cpp:32:50: warning: ‘in’ may be used uninitialized in this function [-Wmaybe-uninitialized]