Question

#include <stdio.h>
//#include <<strong class="highlight">string</strong>.h>

// Function declarations
// typedef __w64 unsigned int size_t
size_t strlen(const char *);
char *strrev(char *);
char *itoa(int, char *, int);

int main() {
    int num = 123;
    char buf[5];

    itoa(num, buf, 10);

    printf("%s\n", buf);

    return 0;
}

size_t strlen(const char *string) {
    const char *s;

    s = <strong class="highlight">string</strong>;
    while (*s)
        s++;
    return s - <strong class="highlight">string</strong>;
}

char *strrev(char *str) {
    char *p1, *p2;

    if (!str || !*str)
        return str;

    for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2) {
        *p1 ^= *p2;
        *p2 ^= *p1;
        *p1 ^= *p2;
    }

    return str;
}

char *itoa(int n, char *s, int b) {
    static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
    int i=0, sign;

    if ((sign = n) < 0)
        n = -n;

    do {
        s[i++] = digits[n % b];
    } while ((n /= b) > 0);

    if (sign < 0)
        s[i++] = '-';
    s[i] = '\0';

    return strrev(s);
}

getting error on this part of the question…

s = string;
while (*s)
s++;
return s – string;

saying missing ‘class’ : missing tag name
and syntax error: <

I don’t know how to fix it.. trying various stuff..

any help would be appreciated..

thanks alot

Answer 1

It looks like you’ve somehow gotten HTML markup into your C++ source code:

s = <strong class="highlight">string</strong>;
while (*s)
    s++;
return s - <strong class="highlight">string</strong>;

I would have gone ahead and fixed it, but the error message refers to a < character, so I think that’s your actual problem. Perhaps you incorrectly copy-and-pasted the code from some web page?

EDIT: I see @RayToal has edited the HTML out of your question.