#include <stdio.h>
int sum(int a, int b)
{
	int ans=a+b;/*型宣言文で代入可*/
	/*int ans; ans=a+b;*/
	return ans;
}

void main()
{
	int x,y,z;
	x=1; y=2;
	z=sum(x,y);
	printf("z= %d\n",z);
}