kdeng00
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
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*
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* Exercise 2-5. Write the function any(s1, s2), which returns the first location in a string s1
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* where any character from the string s2 occurs, or -1 if s1 contains no characters from s2.
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* (The standard library function strpbrk does the same job but returns a pointer to the
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* location.)
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*
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* Author: Kun Deng
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*/
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#include <stdio.h>
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#include <stdlib.h>
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// Returns the first location in a string s1 where any character from string s2
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// occurrs, or -1 if s1 contains no characters from s2
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int any(char *s1, char *s2);
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int main(int argc, char **argv)
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{
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char string_one[15] = "slipgunace";
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char string_two[15] = "okayokayyeah";
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if (argc > 3)
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{
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printf("Provide two arguments:\n");
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printf("./program [string_one] [string_two]\n");
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return -1;
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}
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else if (argc == 3)
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{
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int i;
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for (i = 0; argv[1][i] != '\0'; ++i)
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{
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string_one[i] = argv[1][i];
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}
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string_one[i] = '\0';
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for (i = 0; argv[2][i] != '\0'; ++i)
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{
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string_two[i] = argv[2][i];
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}
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string_two[i] = '\0';
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}
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printf("%15s%5s%15s\n", "String1", "|", "String2");
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printf("%15s%5s%15s\n", string_one, "|", string_two);
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// First index of String1 from a character of String2
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int matching_index = any(string_one, string_two);
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if (matching_index == -1)
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{
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printf("No matching characters from String2 found in String1\n");
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return -1;
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}
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printf("Character %c is found in index %d of String1\n", string_one[matching_index], matching_index);
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return 0;
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}
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int any(char *s1, char *s2)
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{
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// Defaults to no matching found
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int result = -1;
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for (int i = 0; s2[i] != '\0'; ++i)
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{
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char val = s2[i];
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for (int j = 0; s1[j] != '\0'; ++j)
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{
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if (val == s1[j])
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{
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result = j;
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break;
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}
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}
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}
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return result;
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}
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