请教高手一个问题,,
就是如何 调用动态方面名,,方面名均为后缀+数字,
希望可以根据动态方面名来调用不同的方法...
我觉得就是太多重复的代码了..我想用C++类泛型,,应该可以调用相应的方法.

#include "stdafx.h"

#include <iostream>

#include <cmath>

#include <cstdlib>

#include<Windows.h>

#pragma warning(disable:4996) //全部关掉

#pragma warning(disable:4244)

#define DIM 1024

#define DM1 (DIM-1)

#define _sq(x) ((x)*(x)) // square

#define _cb(x) abs ((x)*(x)*(x)) // absolute value of cube

#define _cr(x) (unsigned char)(pow ((x),1.0/3.0)) // cube root

unsigned char GR (int ,int);

unsigned char BL (int ,int);

unsigned char RD1 (int i,int j){

	float x=0,y=0;

	int k;

	for(k=0;k++<256;)

	{

		float a=x*x-y*y+ (i-768.0)/512;

		y=2*x*y+ (j-512.0)/512;

		x=a;

		if(x*x+y*y>4)

			break;

	}

	return log (k)*47;

}

unsigned char GR1 (int i,int j){

	float x=0,y=0;

	int k;

	for(k=0;k++<256;)

	{

		float a=x*x-y*y+ (i-768.0)/512;y=2*x*y+ (j-512.0)/512;

		x=a;

		if(x*x+y*y>4)

			break;

	}

	return log (k)*47;

}

unsigned char BL1 (int i,int j){

	float x=0,y=0;

	int k;

	for(k=0;k++<256;)

	{

		float a=x*x-y*y+ (i-768.0)/512;

		y=2*x*y+ (j-512.0)/512;

		x=a;

		if(x*x+y*y>4)

			break;

	}

	return 128-log (k)*23;

}

unsigned char RD (int i,int j)

{

#define r(n) (rand ()%n)

	static char c[1024][1024];

	return !c[i][j]?c[i][j]=!r(999)?r(256):RD ((i+r(2))%1024,(j+r(2))%1024):c[i][j];

}

unsigned char GR (int i,int j)

{

	static char c[1024][1024];

	return!c[i][j]?c[i][j]=!r(999)?r(256):GR ((i+r(2))%1024,(j+r(2))%1024):c[i][j];

}

unsigned char BL (int i,int j)

{

	static char c[1024][1024];

	return!c[i][j]?c[i][j]=!r(999)?r(256):BL ((i+r(2))%1024,(j+r(2))%1024):c[i][j];

}

unsigned char RD2 (int i,int j){

	double a=0,b=0,c,d,n=0;

	while((c=a*a)+(d=b*b)<4&&n++<880)

	{b=2*a*b+j*8e-9-.645411;a=c-d+i*8e-9+.356888;}

	return 255*pow ((n-80)/800,3.);

}

unsigned char GR2 (int i,int j){

	double a=0,b=0,c,d,n=0;

	while((c=a*a)+(d=b*b)<4&&n++<880)

	{b=2*a*b+j*8e-9-.645411;a=c-d+i*8e-9+.356888;}

	return 255*pow ((n-80)/800,.7);

}

unsigned char BL2 (int i,int j){

	double a=0,b=0,c,d,n=0;

	while((c=a*a)+(d=b*b)<4&&n++<880)

	{b=2*a*b+j*8e-9-.645411;a=c-d+i*8e-9+.356888;}

	return 255*pow ((n-80)/800,.5);

}

unsigned char RD3 (int i,int j){

	static double k;k+=rand ()/1./RAND_MAX;int l=k;l%=512;return l>255?511-l:l;

}

unsigned char GR3 (int i,int j){

	static double k;k+=rand ()/1./RAND_MAX;int l=k;l%=512;return l>255?511-l:l;

}

unsigned char BL3 (int i,int j){

	static double k;k+=rand ()/1./RAND_MAX;int l=k;l%=512;return l>255?511-l:l;

}

unsigned char RD4 (int i,int j){

	float s=3./(j+99);

	float y=(j+sin ((i*i+_sq (j-700)*5)/100./DIM)*35)*s;

	return (int((i+DIM)*s+y)%2+int((DIM*2-i)*s+y)%2)*127;

}

unsigned char GR4 (int i,int j){

	float s=3./(j+99);

	float y=(j+sin ((i*i+_sq (j-700)*5)/100./DIM)*35)*s;

	return (int(5*((i+DIM)*s+y))%2+int(5*((DIM*2-i)*s+y))%2)*127;

}

unsigned char BL4 (int i,int j){

	float s=3./(j+99);

	float y=(j+sin ((i*i+_sq (j-700)*5)/100./DIM)*35)*s;

	return (int(29*((i+DIM)*s+y))%2+int(29*((DIM*2-i)*s+y))%2)*127;

}

void pixel_write (int,int);

FILE *fp;

void pixel_write1(int i, int j)

{

	static unsigned char color[3];

	color[0] = RD1 (i,j)&255;

	color[1] = GR1 (i,j)&255;

	color[2] = BL1 (i,j)&255;

	fwrite (color, 1, 3, fp);

}

void pixel_write2 (int i, int j)

{

	static unsigned char color[3];

	color[0] = RD2 (i,j)&255;

	color[1] = GR2 (i,j)&255;

	color[2] = BL2 (i,j)&255;

	fwrite (color, 1, 3, fp);

}

void pixel_write3(int i, int j)

{

	static unsigned char color[3];

	color[0] = RD3 (i,j)&255;

	color[1] = GR3 (i,j)&255;

	color[2] = BL3 (i,j)&255;

	fwrite (color, 1, 3, fp);

}

void pixel_write4(int i, int j)

{

	static unsigned char color[3];

	color[0] = RD4 (i,j)&255;

	color[1] = GR4 (i,j)&255;

	color[2] = BL4 (i,j)&255;

	fwrite (color, 1, 3, fp);

}

int main ()

{

	char t[256];

	char printfHistory[2048]="正写入文件请稍等";

	printf_s("printfHistory");

	int num=0;

	for(int a=1;a<6;a++)

	{

		sprintf_s(t,"MathPic%d.ppm",a);

		fp = fopen (t,"wb");

		fprintf (fp, "P6\n%d %d\n255\n", DIM, DIM);

		for(int j=0;j<DIM;j++)

		{

			for(int i=0;i<DIM;i++)

			{

				switch (a)

				{

				case 1:

					pixel_write(i,j);

				case 2:

					pixel_write1(i,j);

				case 3:

					pixel_write2(i,j);

				case 4:

					pixel_write3(i,j);

				case 5:

					pixel_write4(i,j);

				default:

					break;

				}

			}

		}

		printf_s("第 %d 张图片 写入成功!\n",a);

	}

	printf_s("所有图片已全部输出，请打开程序目录查看！");

	fclose (fp);

	return 0;

}

void pixel_write (int i, int j)

{

	static unsigned char color[3];

	color[0] = RD (i,j)&255;

	color[1] = GR (i,j)&255;

	color[2] = BL (i,j)&255;

	fwrite (color, 1, 3, fp);

}