Simple question on printf and C. Printing characters of a string one by one

I have weird string that I want to inspect by printing its characters one by one. How can this be done?

I'm worried in case it has any special c开发者_运维百科haracters that may obstruct its printing. Can they be 'escaped'?

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You could loop over the string, printing the characters one by one, and conditionally choosing to print the character or an escape sequence:

char *str, // the original string
     *tmp;
for(tmp = str; *tmp; tmp++)
  {
    printf((iscntrl(*tmp) ? "%02x\n" : "'%c'\n"), *tmp);
  }

This prints one character per line, with control characters printed in hex format.

---

An alternative way to see special characters:

./a.out | hexdump -C

hexdump

---

#include<stdio.h>
main()
{
    int i, count=0;
    char c[30];
    printf("Enter a Char string:");
    scanf("%s", &c[i]);
    for(count=0; count<c[30]; )
    {
        printf("%c", c[i]);
        count=+2;
    }
    return 0;
}