C :

#include <stdio.h>

int main()
{
	int a, b, c;
	scanf("%d %d %d", &a, &b, &c);
	if (a <= b && a <= c)
		printf("%d", a);
	else if (b <= a && b <= c)
		printf("%d", b);
	else if (c <= a && c <= b)
		printf("%d", c);

	return 0;
}

C++ :

#include<iostream>
using namespace std;
int main()
{
  int a,b,c;
  cin>>a>>b>>c;
  if(a>=b)
  {
    if(b>=c)
    {
      cout<<c<<endl;
    }
    else
      cout<<b<<endl;
  }
  else
  {
    if(a>=c)
    {
      cout<<c<<endl;
    }
    else
      cout<<a<<endl;
  }
  return 0;
}

Java :

import java.util.Scanner;
/**
 *
 * @author zhenghan33
 */
public class Main{

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner cin=new Scanner(System.in);
        int a=cin.nextInt();
        int b=cin.nextInt();
        int c=cin.nextInt();
        System.out.println(Math.min(c,Math.min(a,b)));
    }

}