这个代码的主函数怎么写？怎么输出？

#include <stdio.h>
#include <stdlib.h>
typedef struct
{
    float Realpart;
    float Imagepart;
}Complex;
void Create(&Complex C,float x,float y)
{
    C.Realpart=x;
    C.Imagepart=y;
}
float GetReal(Complex C)
{
    return C.Realpart;
}
float GetImag(Complex C)
{
    return C.Imagepart;
}
Complex Add(Complex C1,Complex C2)
{
    Complex sum;
    sum.Realpart=C1.Realpart+C2.Realpart;
    sum.Imagepart=C1.Imagepart+C2.Imagepart;
    return sum;
}
Complex Sub(Complex C1,Complex C2)
{
    Complex difference;
    difference.Realpart=C1.Realpart-C2.Realpart;
    difference.Imagepart=C1.Imagepart-C2.Imagepart;
    return difference;
}
int main(int argc, char *argv[])
{
    
    return 0;
}

main函数怎么写取决于你想达到什么样的目的。如果只是简单的验证一下函数的效果，就定义两个结构体，用上面的函数实验一下就可以了。

参考如下，如有帮助，请采纳一下，谢谢。

#include <stdio.h>
#include <stdlib.h>
typedef struct
{
	float Realpart;
	float Imagepart;
}Complex;
//这个地方改为指针
void Create(Complex *C,float x,float y)
{
	C->Realpart=x;
	C->Imagepart=y;
}
float GetReal(Complex C)
{
	return C.Realpart;
}
float GetImag(Complex C)
{
	return C.Imagepart;
}
Complex Add(Complex C1,Complex C2)
{
	Complex sum;
	sum.Realpart=C1.Realpart+C2.Realpart;
	sum.Imagepart=C1.Imagepart+C2.Imagepart;
	return sum;
}
Complex Sub(Complex C1,Complex C2)
{
	Complex difference;
	difference.Realpart=C1.Realpart-C2.Realpart;
	difference.Imagepart=C1.Imagepart-C2.Imagepart;
	return difference;
}
int main(int argc, char *argv[])
{
	Complex c1;
	Create(&c1,1.1,1.2); //这个地方，第一个参数改为指针
	printf("c1.Realpart = %.1f;c1.Imagepart=%.1f\n",GetReal(c1),GetImag(c1));
	Complex c2;
	c2.Realpart = 2.1;
	c2.Imagepart = 2.2;
	printf("c2.Realpart = %.1f;c2.Imagepart=%.1f\n",GetReal(c2),GetImag(c2));
	Complex c3 = Add(c1,c2);
	printf("c1+c2= c3.Realpart =%.1f,c3.Imagepart=%.1f\n",GetReal(c3),GetImag(c3));
	Complex c4 = Sub(c1,c2);
	printf("c1-c2= c4.Realpart =%.1f,c4.Imagepart=%.1f\n",GetReal(c4),GetImag(c4));
	return 0;
}