Pass char pointer into function

#include <stdio.h>

void print_vertical(char *str);  /* prototype */

int main(int argc, char *argv[])
{
  if(argc > 1) print_vertical(argv[1]);

  return 0;
}

void print_vertical(char *str)
{
  while(*str)
    printf("%c\n", *str++);
}

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Pass char pointer into function : Function Parameters « Function « C / ANSI-C

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