#import <Foundation/Foundation.h>
#include <stdint.h>

void sort(int *, int *);

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        // insert code here...
        NSLog(@"Hello, World!");
        int *p1, *p2;
        int a,b;
        printf("input:\n");
        scanf("%d%d",&a,&b);
        p1 = &a;
        p2 = &b;
        sort(&a,&b);
        printf("sort result is %d,%d\n",*p1,*p2);
    }
    return 0;
}

void sort(int *a, int *b)
{
    int p;
    if (*a < *b) {
        p = *a;
        *a = *b;
        *b = p;
    }
}