write a C program to print reverse of the given string..

#include

int string_length(char s[])
{
int i;
for (i = 0; s[i]; i++)
;
return i;
}
/* Function reverse */
void string_reverse(char s[])
{
int i, j;
for (i = 0, j = string_length(s)-1; i{
int tmp = s[i];
s[i] = s[j];
s[j] = tmp;

}
}
main()
{
char s[] = "Pavan";
string_reverse(s);
printf("%s\n", s);
}