C :

char tongji(str0,b)
char str0[100];
int b[4];
{int i;
for(i=0;str0[i]!='\0';i++)
{if(str0[i]>=65&&str0[i]<=90||str0[i]>=97&&str0[i]<=122) b[0]++;
else if(str0[i]>=48&&str0[i]<=57) b[1]++;
else if(str0[i]==32) b[2]++;
else b[3]++;}
}
int main()
{char str1[100];static int i,a[4];
gets(str1);
tongji(str1,a);
for(i=0;i<4;i++)
printf("%d ",a[i]);printf("\n");
return 0;
}

C++ :

#include <iostream>
//#include <stdio.h>
//#include <conio.h>
#include <string>
//#include <math.h>
using namespace std;

int main()
{
	string k;
	getline(cin,k);
	int i = 0;
	int a = 0;
	int b = 0;
	int c = 0;
	int d = 0;
	for (; i<k.length() ; i++) {
		if (isalpha(k.at(i))) {
			a++;
		} else if (isdigit(k.at(i))) {
			b++;
		} else if (k.at(i) == ' ') {
			c++;
		} else {
			d++;
		}
	}
	cout << a << " " << b << " " << c << " " << d;
	//_getch();
	return 0;
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	static int cSum = 0,nSum = 0,sSum = 0,oSum = 0;
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);

		String s = input.nextLine();
		Sum(s);
		System.out.println(cSum + " " + nSum + " " + sSum + " " + oSum + " ");
		input.close();
	}
	
	public static void Sum(String s){
		for(int i = 0; i < s.length(); i ++){
			if(s.charAt(i) > 47 && s.charAt(i) < 58){
				nSum ++;
			}else if((s.charAt(i) > 64 && s.charAt(i) < 91) ||(s.charAt(i) > 96 && s.charAt(i) < 123)){
				cSum ++;
			}else if(s.charAt(i) == 32){
				sSum ++;
			}else{
				oSum ++;
			}
		}
	}

}

Python :

a = raw_input()
#b = a[1]
#c = a[2]
#a = a[0]

import re
p = re.compile('[A-Za-z]')
l = re.findall(p,a)
zm = len(l)
p = re.compile('[0-9]')
sz = len(re.findall(p,a))
p = re.compile('[ ]')
kg = len(re.findall(p,a))
print "%d %d %d %d " %(zm ,sz,kg,len(a)-zm-sz-kg)