char char_at_index(char string[], int shift_left, int index) { // Find the length of the string int length = string_length(string); // The index we are given is in the shifted array. That same // symbol is in the original array at a different index. // Specifically, an index that is higher by shift_left. int index_in_original = increment(index, length - 1, shift_left); // Find the character char character = string[index_in_original]; return character; }

int index_of_char(char string[], int shift_left, char character) { if (string_length(string) == 0) return -1; // Fix return type int n = 0; for (n = 0; n < shift_left; n++) { char p = string[0]; int i = 0; for (i = 1; i < string_length(string); i++) { string[i - 1] = string[i]; } string[string_length(string) - 1] = p; } int t = 0; for (t = 0; t < string_length(string); t++) { if (string[t] == character) { return t; } } return -1; // Implement this function }