How do i change char to number?

Question

i need to change some character into numbers for example:

I = 1

R = 2

E = 3

A = 4

S = 5

G = 6

T = 7

B = 8

P = 9

O = 0

input example: HELLO IM GOOD

output example: H3LL0 1M G00D

Answer 1

Are you trying to make us do your homework?

Anyhow, there are multiple possibilities.

1. For the starter student - The most basic one is looping through your string and replacing each needed char with a new one (you can use a switch case, look-up-tables, etc).

2. You can convert to a string and use it's methods as such:

   string s;
   s="HELLO IM GOOD"
   s.replace('I,'1')
   s.replace('R,'2')
   .
   .
   .
   cout << s; //print solution
   

Answer 2

This code helps:)

#include <iostream>
#include<stdio.h>
using namespace std;

int main() {
    string s;
    getline (cin, s); //used to get string input with spaces
    string s1 = "OIREASGTBP";
    string s2 = "0123456789";

    for (int i=0; i<s.size(); i++)
    {
        int a = s1.find(s[i]);
        if(a != -1)
        {
             s[i] = s2[a];
        }
    }
    cout<<s;
}