小贴士：用while(t--)可以无需遍历for循环

#include<bits/stdc++.h>
using namespace std;
char c[100005];
int main()
{
	int t;
	cin>>t;
	while(t--)
	{
		string s;
		cin>>s;
		int i;
		for(i=0;i<s.size();i++)
		{
			c[i]=s[i];
		}
		sort(c,c+s.size());
		for(i=0;i<s.size();i++)
		{
			cout<<c[i]<<' ';
		}
		cout<<endl;
	}
}

C :

#include <stdio.h>
void swap(char *a, char *b){
    char t;
    if(*a > *b){
        t = *a;
        *a = *b;
        *b = t;
    }
}
int main(){
    int n;
    char a, b, c;
    scanf("%d%*c", &n);
    while(n--){
        scanf("%c%c%c%*c", &a, &b, &c);
        swap(&a, &b);
        swap(&b, &c);
        swap(&a, &b);
        printf("%c %c %c\n", a, b, c);
    }
    return 0;
}

C++ :

#include<stdio.h>
main()
{
  int count;
  char a,b,c,s,m,n,q;
  scanf("%d\n",&count);
  while(count--)
      {
      scanf("%c%c%c",&a,&b,&c);
      scanf("%c",&s);
      if(a>b)
          {
          m=a;
          a=b;
          b=m;
          }
      if(a>c)
          {
          n=a;
          a=c;
          c=n;
          }
      if(b>c)
          {
          q=b;
          b=c;
          c=q;
          }
      printf("%c%2c%2c\n",a,b,c);
      }
      return 0;
}

Java :

import java.util.Arrays;
import java.util.Scanner;
public class Main
{
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		int N=sc.nextInt();
		while(N-->0)
		{
			String s=sc.next();
			char[] ch=s.toCharArray();
			Arrays.sort(ch);
			for(int i=0;i<ch.length-1;i++)
			{
				System.out.print(ch[i]+" ");
			}
			System.out.println(ch[ch.length-1]);
		}
	}
}