수다닷컴

#include stdio.h
#include math.h
double sansul(int a, int b);
double giha(int a, int b);
double johwa(int a, int b);
int main(void)
{
int x, y;
double ss,gh,jh;

printf(x : );
scanf_s(%d, &x);
printf(y : );
scanf_s(%d, &y);
ss = sansul(x,y);
gh = giha(x,y);
jh = johwa(x,y);
printf(sansul : %lf, giha : %lf, johwa : %lf\n, ss,gh,jh);
}
double sansul(int a, int b)
{
int x, y;
double ss;
ss = (x+y)/2;

return ss;
}
double giha(int a, int b)
{
int x,y;
double gh;
gh = sqrt(x*y);
return gh;
}
double johwa(int a, int b)
{
int x,y;
double jh;
jh = (2*x*y)/(x+y);
return jh;
}

이런식으로 짰는데 역시나.. 숫자만쓰라하고 결과값이 안나와요..ㅜㅜ

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