Thread: isvowel() included in ctype for C lang?

I know its available in C++, but when I compile, I'm getting ERROR: Undefined symbol: .isvowel. Am I doing something wrong(probably the case) or what else could be wrong?

isvowel() is not part of the C standard. You would have to write your own routine.

Ok what I'm trying to do is count the number of vowels in a string. This is what I have so far:

Code:

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

int vowelcount(char text);
int digitcount(char *text);

int main() {
	
	int x, y, d, size;
	char v, text[81];

	printf("Please type a string or hit 'Enter' to quit:\n");
	fgets(text, 81, stdin);

	while (text[1]!='\0') {
		size=strlen(text)-1;
		printf("count=%d\n", size);
		d=digitcount(text);
		printf("digit=%d\n", d);
		y=vowelcount(text);
		printf("vowel=%d\n", y);





		printf("Please type a string or hit 'Enter' to quit:\n");
		fgets(text, 81, stdin);
	}
return 0;
}


int vowelcount(char text) {

	int y;
	char v;

	y=0;
	v=toupper(text);

	if (v == 'A' || v == 'E' || v == 'I' || v == 'O' || v == 'U')
		y++;

	return y;
}

int digitcount(char *text) {
	
	int x, d;
	
	d=0;
	
	for(x=0;text[x]!='\0';x++)
		if(isdigit(text[x]))
			d++;
	
	return d;
}

I keep gettting a "Function argument assignment between types "unsigned char" and "unsigned char*" is not allowed."Should I be using a for loop like this for(x=0;text[x]!='\0';x++)befoire the if statement in the function vowelcount? Any help?

I understand some of your program, but what is *t++ = *s;?

Originally Posted by nizbit

Ok what I'm trying to do is count the number of vowels in a string. This is what I have so far:

Code:

.........................................
	while (text[1]!='\0') {
		size=strlen(text)-1;
		printf("count=%d\n", size);
		d=digitcount(text);
		printf("digit=%d\n", d);
		y=vowelcount(text); //<<-- look here
		printf("vowel=%d\n", y);
................................
	}
return 0;
}

int vowelcount(char text) { //<<-- look here
..................................
}

I keep gettting a "Function argument assignment between types "unsigned char" and "unsigned char*" is not allowed."

It's all there. You're sending a string (char*) to a function that receives a single char. It should be

Code:

y=vowelcount(text[index]);

Second you have a infinite loop...
Third, declare a variable to control the cicle and index the string. At the end of the cicle increment it. When text[index]=='\0' end cicle.

> int vowelcount(char text) {
Use the same code you have for digitcount

> if (v == 'A' || v == 'E' || v == 'I' || v == 'O' || v == 'U')
And put this line inside a new function called isvowel()


@Mister C
> how this for a start..
It sucks big time - using gets(), uninitialised variables, NULL pointers, dubious type conversions
I'm really tempted to just mod your post out of existence, just in case someone sees your title and thinks it's credible code.

I'm just all screwed up. This is just kicking my arse. Now I really like I don't know what I'm doing. I can't use switch case because it was not covered. I'm just trying to count how many vowels are in the string. We have to make it a function. So do I two functions-one to analyze the string and then one to count, or I can do it all in one? Here is my recent code:

Code:

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

int vowelcount(char *text);
int digitcount(char *text);

void main(void) {
	
	int x, y, d, size;
	char text[81];

	printf("Please type a string or hit 'Enter' to quit:\n");
	fgets(text, 81, stdin);

	while (text[1]!='\0') {
		size=strlen(text)-1;
		printf("count=%d\n", size);
		d=digitcount(text);
		printf("digit=%d\n", d);
		y=vowelcount(text);
		printf("vowel=%d\n", y);





		printf("Please type a string or hit 'Enter' to quit:\n");
		fgets(text, 81, stdin);
	}
}

int vowelcount(char *text) {
	
	int x, y;

	y=0;
	toupper(text[x]);

	for(x=0; text[x]!='\0'; x++)
		if(text[x] == 'A' || text[x] == 'E' || text[x] == 'I' || text[x] == 'O' || text[x] == 'U')
			y++;
	
	return y;
}

int digitcount(char *text) {
	
	int x, d;
	
	d=0;
	
	for(x=0; text[x]!='\0'; x++)
		if(isdigit(text[x]))
			d++;
	
	return d;
}

Code:

int vowelcount(char *text) {
	
	int x, y;

	y=0;
	toupper(text[x]);    // Look more into the placement and usage of this

	for(x=0; text[x]!='\0'; x++)
		if(text[x] == 'A' || text[x] == 'E' || text[x] == 'I' || text[x] == 'O' || text[x] == 'U')
			y++;
	
	return y;
}