#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
struct point{
float x;
float y;
};
struct complex{
double re;
double im;
};
void add(int a, int b, int *p);
void swap(int *x, int *y);
float distance(struct point *p, struct point *q);
void print_point(struct point*p);
void assign(struct complex *p,double real,double imag);
void add_complex(struct complex *result,struct complex *p,struct complex *q);
void prt(struct complex *p);
int main(void){
int sum;
int a,b;
a=10;b=20;
struct point c={1.0,4.0};
struct point d={5.0,1.0};
struct complex c1,c2,c3;
//add(10,20,&sum);
//printf("sum=%d\n",sum);
//
//printf("before:a=%d, b=%d\n",a,b);
//swap(&a,&b);
//printf("after :a=%d, b=%d\n",a,b);
//printf("점 c의 좌표:");
//print_point(&c);
//printf("\n점 d의 좌표:");
//print_point(&d);
//printf("\n두 점 사이의 거리: %f\n",distance(&c,&d));
//assign(&c1,1.0,2.0); /* c1 : 1+2i*/
//assign(&c2,3.0,4.0); /* c2 : 3+4i*/
//add_complex(&c3,&c1,&c2); /*c3=c1+c2*/
//prt(&c3);
return 0;
}
void add(int a,int b, int*p){
*p=a+b;
}
void swap(int *x,int *y)
{
int tmp;
tmp = *x;
*x=*y;
*y=tmp;
}
float distance(struct point *p,struct point *q){
float dx,dy,distance;
dx=p->x-q->x;
dy=p->y-q->y;
distance=sqrt(dx*dx+dy*dy);
return distance;
}
void print_point(struct point *p){
printf("(%g,%g)",p->x,p->y);
}
void assign(struct complex *p,double real,double imag){
p->re=real;
p->im=imag;
}
void add_complex(struct complex *result,struct complex *p,struct complex *q){
result->re=p->re+q->re;
result->im=p->im+q->im;
}
void prt(struct complex *p){
printf("%g + %gi\n",p->re,p->im);
}
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