function stringToDecimal

The function/method stringToDecimal accepts an argument str representing a string value. The string str contains only alphabets.

The function/method stringToDecimal must return an integer X whose binary representation is formed by replacing each odd ASCII alphabet with 1 and each even ASCII alphabet with 0 in the given string.

Your task is to implement the function stringToDecimal so that the program runs successfully.

IMPORTANT: Do not write the main() function as it is already defined.

Boundary Condition(s):
1 <= Length of the string str <= 50

Example Input/Output 1:
Input:
Moon

Output:
14

Explanation:
The ASCII value of M is 77.
The ASCII value of o is 111.
The ASCII value of n is 110.
So Moon -> 1110 -> 14.

Example Input/Output 2:
Input:
SouthIndia

Output:
915

#include <stdio.h>
#include <stdlib.h>
long long int stringToDecimal(char *str)
{
    int x = strlen(str), y = 0;
    long long int retNo = 0;
    for(int i = x-1; i >= 0; i--)
    {
        retNo += (str[i]%2)*(pow(2, y));
        y += 1;
    }
    return retNo;
}
int main()
{
    char str[51];
    scanf("%s", str);
    printf("%lld", stringToDecimal(str));
    return 0;
}