/**
 * Two ways of doing strlen.  The difference is just 
 * using pointers or arrays.  Both ways work.
 * Here is use "string" to mean an array of char that is
 * guaranteed to be null terminated
 * @author gtowell
 * Created: March 2021
 * 
 * **/

#include <stdio.h>

/**
 * The length of a string using pointers
 * @param a pointer to the beginning of a string. 
 * @return the length of the string
 * **/
int strlenP(char *strPtr) {
    int i = 0;
    while (*strPtr != '\0') {
        strPtr++;
        i++;
    }
    return i;
}

/**
 * The length of a string using array notation
 * @param strArr the character array containing the string
 * @return the length of the string
 * **/
int strlenA(char strArr[]) {
    int i = 0;
    while (strArr[i] != '\0') {
        i++;
    }
    return i;
}

/**
 * Example using the command line parameters
 * **/
int main(int argc, char const *argv[])
{
    for (int i = 0; i < argc; i++) {
        printf("%d %d %s\n", strlenP(argv[i]), strlenA(argv[i]), argv[i]);
    }
    return 0;
}