Thread: 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 .....

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 !!