Counting a character with strings

Im having trouble getting this program to work...I have a string "How do you know" ...and i have to count how many 'o's are in the string .... heres my source can anybody help me....thanx...

#include <stdio.h>
#include <string.h>

int main (void)
{
char *strng = "How do you know";
char *pToken;
int tokenCount;

tokenCount = 0;

pToken = strchr(strng,'o');

while (pToken)
{
tokenCount++;
}

printf("%2d",tokenCount);

return 0;
}

modify this code and you will get the answer

#include <stdio.h>
#include <string.h>

int main (void)
{
char *strng = "How do you know";
char *pToken;
int tokenCount;

tokenCount = 0;

pToken = strchr(strng,'o');

while (pToken)
{
tokenCount++;
strng=pToken++;
pToken = strchr(strng,'o');

}

printf("%2d",tokenCount);

return 0;
}

it still doesnt seem to print the number of 'o's it found in the string .....:confused:

Code:

---


#include <stdio.h>
#include <string.h>

int main (void)
{
        char *str = "How do you know";
        char *ptr;
        int counter = 0;

        while (ptr = strchr (str, 'o'))
        {
                counter++;
                str = ptr + 1;
        }

        printf ("%d\n", counter);

        return 0;
}

---

CAUTION: This program changes the value of str !!

Try this version:

Code:

---

#include <stdio.h>

int main(void)
{
  char *temp,*str="How do you know?";
  int count=0;

  temp=str;
 
  while(*str!='\0')
    {
      if (*str=='o' || *str=='O') count++;
    }

  str=temp;

  printf("number of o´s in \"%s\": %d\n", count, str);

  return 0;
}

---

klausi