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發一下我當年的練習程序

#include

#include

#include

#include

double?exp(double?x)

{double?l,m;

unsigned?int?n;

l=1;?m=1;?n=0;

do?{n++;

m=x*m/n;

l=l+m;?}

while?((-1.0E-6<=m)&&(m<=1.0E-6));

return?l;?}

main()

{int?graphmode,?graphdriver=DETECT;

int?x,y,z;

initgraph(?&graphdriver?,&graphmode?,"?");

setcolor(0);

setbkcolor(5);

line(0,470,640,470);

line(320,0,320,480);

for(x=-320.0;x<320.0;x++)

{y=exp(x);

putpixel(x+320,470-y,9);}

getch();}

#include

#include

#include

#include

#include

main()

{int?graphmode,?graphdriver=DETECT;

double?x,y,z;

registerbgidriver(EGAVGA_driver);

initgraph(?&graphdriver?,&graphmode?,"?");

setcolor(0);

setbkcolor(0);

line(0,470,640,470);

line(320,0,320,480);

for(x=-640.0;x<640.0;x++)

{putpixel(sin(x)*100+320,240-100*cos(x*0.5),2);}

getch();}