Thread: Character count program

I have the character count program that works like it should, but I can't figure out code to count the number of non-alphanumeric characters. Non alphanumeric characters are !@#$%^&*() basically they are any characters that do not contain the value of a number or a letter. Is there code to find non-alphanumeric characters?

Code:

#include<stdio.h>
#include<conio.h>

void main()
{
int length=0,upper=0,lower=0,digits=0;
char str[80];
char strlen[80];
int i;

printf("\nEnter The String : ");
gets(str);


i=0;

while(strlen[length]!='\0')
        length++;

while(str[i]!='\0')
  {
  if(str[i]>='A' && str[i]<='Z')
     upper++;
  if(str[i]>='a' && str[i]<='z')
     lower++;
  if(str[i]>='0' && str[i]<='9')
	 digits++;

  i++;
  }

 printf("\nLength of the String is : %d",length);
 printf("\nUppercase Letters : %d",upper);
 printf("\nLowercase Letters : %d",lower);
 printf("\nDigits : %d",digits);



    getch();
 }