C :

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
char s[1001],t[1],x[1001];
int main()
{
    gets(s);
    int len = strlen(s);
    int i;
    for(i=0;i<len;i++){
        if (i==0&&s[i]!=' '|| i>0 && s[i]!=' ' && s[i-1]==' ') {
            t[0]=toupper(s[i]);
            strcat(x, t);
        }
    }
    printf("%s",x);
    return 0;
}

C++ :

#include <iostream>
#include <cstring>
using namespace std;

char zifu(char c){
	char t;
	if (c >= 'a' && c <= 'z'){
		t = c - 32;
	}else if (c >= 'A' && c <= 'Z'){
		t = c;
	}
	return t;
}

int main(){
	int i;
	char c;
	char a[2000];
	gets(a);
	for (i = 0;i < strlen(a);i++){
		if (i == 0 && a[i] != ' '){
			c = zifu(a[i]);
			cout<<c;
		}else if(i != 0 && a[i] != ' ' && a[i - 1] == ' '){
			c = zifu(a[i]);
			cout<<c;
		}
	}
}

Pascal :

program liumohan;
var i:longint; s,m:string;
begin
  read(S);
  insert(' ',s,0);
  for i:=1 to length(S) do
    begin
      if s[i]=' ' then
      if (ord(s[i+1]) in [65..90]) or (ord(s[i+1]) in [97..122]) then
        m:=m+s[i+1];
        end;
       writeln(upcase(m));
  end.

Java :

import java.util.Scanner;
public class Main{
	public static void main(String[] args) {
		Scanner scanner=new Scanner(System.in);
		String str=scanner.nextLine();
		str=str.trim();
		String[] strArray=str.split(" ");
		for(int i=0;i<strArray.length;i++){
			if(!strArray[i].equals("")&&strArray[i]!=null){
				char chr=strArray[i].charAt(0);
				if(chr>=97&&chr<=122){
					chr=(char) (chr-32);
				}
				System.out.print(chr);
			}
			
		}
	}
}

Python :

str = input();
str = str.strip()
li = str.split(" ");
for s in li:
   if len(s) != 0:
    s = s[0].upper();
    print(s,end='')