save 5 chars as int

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

unsigned int turn_char_to_int(char pChar);
unsigned int turn_string_to_int(char string[6]);


int main ()
{
    char test[6] = "abcde";
    //printf("%d", turn_char_to_int('a'));
    printf("%d", turn_string_to_int(test));

}

unsigned int turn_string_to_int(char string[6])
{
    char ret[11] = "";
    char tmp [3];
    for(int i = 0; i < strlen(string); i++)
    {

        if(string[i] != '\0')
        {
            sprintf(tmp, "%d", turn_char_to_int(string[i]));
            printf("%c %d %s \n", string[i], turn_char_to_int(string[i]), tmp);
            strcat(ret, tmp);
        }
    }
    unsigned int iRet = atoi(ret);
    return iRet;
}

unsigned int turn_char_to_int(char pChar)
{
    switch(pChar)
    {
    case 'a':
        return 10;
    case 'b':
        return 11;
    case 'c':
        return 12;
    case 'd':
        return 13;
    case 'e':
        return 14;
    case 'f':
        return 15;
    case 'g':
        return 16;
    case 'h':
        return 17;
    case 'i':
        return 18;
    case 'j':
        return 19;
    case 'k':
        return 20;
    case 'l':
        return 21;
    case 'm':
        return 22;
    case 'n':
        return 23;
    case 'o':
        return 24;
    case 'p':
        return 25;
    case 'q':
        return 26;
    case 'r':
        return 27;
    case 's':
        return 28;
    case 't':
        return 29;
    case 'u':
        return 30;
    case 'v':
        return 31;
    case 'w':
        return 32;
    case 'x':
        return 33;
    case 'y':
        return 34;
    case 'z':
        return 35;
    case ' ':
        return 36;
    case '.':
        return 37;

    }
}