Strings - need digits

[s.sidak]

Hi

I am trying to write a code that accpets a string of characters. I need to count the number of digits in that string and return the counted value.

This is my code

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

#define MAX 15

int digcnt(int c);

int main( int argc, char *argv[]) {
char x[MAX];
int c;

printf("Enter a string of chars and digits:\n");

// fgets(x, MAX, stdin);
while(( c= getchar()) !='\n') {
c =x[MAX];

}

digcnt(c);
return 0;
}

int digcnt(int c) {

int b;

for(b=0; b<MAX; b++) {
if(isdigit(c)){
b++;
}
}
printf("There are %d digits in the string.\n", b);
return b;
}

Also how do i check if the string (in my case, x[MAX]) contains digits?
My output is that it gives me the number of MAX as the number of digits.

All help is appreciated.

[FrozenMind]

i think u should use sscanf(x, "%d", &c);
inside if to check if the c is a digit
like if ( x[i] >= '0' && x[i] <= '9')
i'm not sure

[CommonTater]

Hi

I am trying to write a code that accpets a string of characters. I need to count the number of digits in that string and return the counted value.
All help is appreciated.

Ok, there are a number of problems in the sample provided but most seem to follow the error shown here...

// fgets(x, MAX, stdin);
while(( c= getchar()) !='\n') {
c =x[MAX];

Think about what you are assigning to what... The goal is to build a string with the typed characters in it... is it not? Which is your string and which is your input variable?
How do you add new characters to the string?

In C results are always on the left. It's not 6 + 4 = 10 It's 10 = 6 + 4

[evariste]

Hi,
a small program to do what you need :

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


#define		BUFFER	16

int
main(int argc, char **argv)
{
	int		count = 0;
	char	my_string[BUFFER];
	int		i;
	
	while (fgets(my_string, BUFFER, stdin)) {
		for(i = 0; i < BUFFER; i++) {
			if (isdigit(my_string[i]))
				count++;
			if (my_string[i] == '\n')
				goto end;
		}
	}
end:
	printf("Digits : %d\n", count);
	
	return 0;
}

Regards.

[CommonTater]

Hi,
a small program to do what you need :

And how much do you think our friend learned from that?

I don't mean to be rude but people don't learn when you simply hand them the answers.

[BillyTKid]

fgets is better than getchar/scanf("%c") stuff.
You need another variable for count the digits, you use one variable for iteration and count.

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

#define MAX 15

int digcnt(char *x);

int main( int argc, char *argv[]) {
char x[MAX];

puts("Enter a string of chars and digits:");

fgets(x, MAX, stdin);

digcnt(x);
return 0;
}

int digcnt(char *x) {

int b,count=0;

for(b=0; x[b]!='\0'; b++) {
if(isdigit(x[b])){
count++;
}
}
printf("There are %d digits in the string.\n", count);
return count;
}

[evariste]

And how much do you think our friend learned from that?

I don't mean to be rude but people don't learn when you simply hand them the answers.

That's true , i'm sorry.

Regards.

[s.sidak]

Hi all

Thank You very much for ur replies. Everything is working now, all thanks to your help and by showing me the examples.

I was able to understand the two codes given.

Thanks for your help.