Finished 2.8

2020-10-17 20:56:37 -04:00
parent 431a789144
commit e42a7d310f
1 changed files with 90 additions and 0 deletions
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 /*
 *
 * Exercise 2-5. Write the function any(s1, s2), which returns the first location in a string s1
 * where any character from the string s2 occurs, or -1 if s1 contains no characters from s2.
 * (The standard library function strpbrk does the same job but returns a pointer to the
 * location.)
 *
 * Author: Kun Deng
 */
 #include <stdio.h>
 #include <stdlib.h>
 // Returns the first location in a string s1 where any character from string s2
 // occurrs, or -1 if s1 contains no characters from s2
 int any(char *s1, char *s2);
 int main(int argc, char **argv)
 {
    char string_one[15] = "slipgunace";
    char string_two[15] = "okayokayyeah";
    if (argc > 3)
    {
        printf("Provide two arguments:\n");
        printf("./program [string_one] [string_two]\n");
        return -1;
    }
    else if (argc == 3)
    {
        int i;
        for (i = 0; argv[1][i] != '\0'; ++i)
        {
            string_one[i] = argv[1][i];
        }
        string_one[i] = '\0';
        for (i = 0; argv[2][i] != '\0'; ++i)
        {
            string_two[i] = argv[2][i];
        }
        string_two[i] = '\0';
    }
    printf("%15s%5s%15s\n", "String1", "|", "String2");
    printf("%15s%5s%15s\n", string_one, "|", string_two);
    // First index of String1 from a character of String2
    int matching_index = any(string_one, string_two);
    if (matching_index == -1)
    {
        printf("No matching characters from String2 found in String1\n");
        return -1;
    }
    printf("Character %c is found in index %d of String1\n", string_one[matching_index], matching_index);
    return 0;
 }
 int any(char *s1, char *s2)
 {
    // Defaults to no matching found
    int result = -1;
    for (int i = 0; s2[i] != '\0'; ++i)
    {
        char val = s2[i];
        for (int j = 0; s1[j] != '\0'; ++j)
        {
            if (val == s1[j])
            {
                result = j;
                break;
            }
        }
    }
    return result;
 }