Write a recursive function to convert a given string into the number it represents. That is input will be a numeric string that contains only numbers, you need to convert the string into corresponding integer and return the answer.

PROBLEM:-

String to Integer

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Write a recursive function to convert a given string into the number it represents. That is input will be a numeric string that contains only numbers, you need to convert the string into corresponding integer and return the answer.

Input format :

Numeric string S (string, Eg. "1234")

Output format :

Corresponding integer N (int, Eg. 1234)

Constraints :

0 <= |S| <= 9
where |S| represents length of string S.

Sample Input 1 :

1231

Sample Output 1 :

1231

Sample Input 2 :

12567

Sample Output 2 :

12567

SOLUTION:-
#include <iostream>
using namespace std;
#include<string.h>
#include<math.h>
int stringToNumber(char input[]) {
    // Write your code here
    if(strlen(input)==1)
        return input[0]-48;
    
    int a=stringToNumber(input+1);
    int b=input[0]-48;
    
    return b*pow(10,strlen(input)-1)+a;
    

}




int main() {
    char input[50];
    cin >> input;
    cout << stringToNumber(input) << endl;
}

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