Practice - if-else if-else statement

/*
Program to check weight on different planets using if-else if-else statement.

Compile and execute using:
g++ space.cpp
./a.out

*/
#include <iostream>

int main() {
  double weight;
  int plat;

  std::cout << "Enter your earth weight: ";
  std::cin >> weight;

  std::cout << "\nChoose the planet number that you wanna fight on:  \n\n";
  std::cout << "1. Mercury\n 2. Venus\n 3. Mars\n 4. Jupiter\n 5. Saturn\n 6. Uranus\n 7. Neptune\n";
  std::cin >> plat; //remember to store input into variable!!

  if (plat == 1 ){
    weight *= 0.38;
  }
  else if (plat == 2){
    weight *= 0.91;
  }
  else if (plat == 3){
    weight *= 0.38;
  }
  else if (plat == 4){
    weight *= 2.34;
  }
  else if (plat == 5){
    weight *= 1.06;
  }
  else if (plat == 6){
    weight *= 0.92;
  }
  else if (plat == 7){
    weight *= 1.19;
  }

std::cout << "Your weight would be: " <<  weight << "\n";

}