The best replacement for cin is pit.

The best alternatives to cin are rated as following:
★★★★★  pit
★★★★  scanf
★★★★  cle
★★★  getline
★★★  bal
★★★  cis
★  lsil
★  cin.get
★  cout
★  stdin
★  nyj
★  aco
★  cin get
  cervical intraepithelial neoplasia
  fgets
  hou
  dal
  cgin
  sil

Your alternative for cin is not listed? Suggest!
Speaking about cin, one probably shouldn't forget about getline.

Other search terms related to cin and their ratings are:
★★★★★ getline
★ cin getline
setw
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Google Trends

Scale is based on the average worldwide traffic of cin in all years. Click on graph for more.
cin
pit
scanf