#include<stdio.h>
int main(){
    int i,j,x,y,z;
    printf("input 3 numbers:\n");
    scanf("%d %d %d",&x,&y,&z);
    i=MAX(x,y,z);
    j=MIN(x,y,z);
    printf("MAX is %d,MIN is %d",i,j);
    return 0;
} 
int MAX(int a,int b,int c){
    return a>b?a>c?a:c:b>c?b:c; 
    /*條件1？條件2？結果1：結果3：條件3？結果2：結果3 */
 

}
int MIN(a,b,c){
    return a<b?a<c?a:c:b<c?b:c;
}

//形參實參傳遞
#include<stdio.h>
int main(){
    int a;
    printf("input a number:\n");
    scanf("%d",&a);
    printf("%d",X(a));
    return 0;
} 
int X(int a){
    int i;
    for(i=a-1;i>0;i--){
        a+=i;
    }
    return a;
}