c - the following code always stuck and the window hangs - 


 #include<graphics.h>  #include<conio.h>  #include<stdlib.h>   #include<dos.h>   #include<alloc.h>  main()   {     int gd = detect, gm, area, temp1, temp2, left = 25, top = 75;     void far *p;      initgraph(&gd,&gm,"c:\\turboc3\\bgi");      rectangle(25,75,100,100);     int sz=imagesize(25,75,100,100);     p=farmalloc(sz);     getch();      temp1 = 200;     temp2 = 200;      getimage(left, top, left + 100, top + 100, p);     putimage(left, top, p, xor_put);     getch();     putimage(temp1 , temp2, p, xor_put);      getch();     closegraph();     return 0; }

whenever execute above code compiler stucks , windows hangs. don't know how use getimage() , putimage() . want design tetris in c first getting hands on these functions

you have not allocated enough memory image, with

sz=imagesize(25,75,100,100); p=farmalloc(sz); ... getimage(left, top, left + 100, top + 100, p);

i suggest using image size

sz=imagesize(left, top, left + 100, top + 100);

which uses same parameters getimage().


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