C++ map problem

spd_sof 2011-01-30 13:51:12 UTC #1

i have declared the following as global

map h;
map x;

i want to re intialize all of the values in a map to zero how to do it please help???

leppyr64 2011-01-30 13:58:16 UTC #2

cplusplus.com/reference/stl/map/

spd_sof 2011-01-30 14:03:01 UTC #3

sir can u please write the code snippet.... plz.

spd_sof 2011-01-30 14:43:59 UTC #4

somebody plz reply...

leppyr64 2011-01-30 15:02:23 UTC #5

Everything you need is on that page.

Give a man a fish he'll eat for a day. Teach a man to fish and he'll never go hungry.

spd_sof 2011-01-30 15:18:24 UTC #6

Sir i am not getting it... i will learn fishing next time ...

leppyr64 2011-01-30 15:39:20 UTC #7

Did you even read the page?

spd_sof 2011-01-31 16:45:57 UTC #8

is it map.clear();

leppyr64 2011-01-31 17:37:45 UTC #9

Of course.

Technically it won't reset the values to zero, but it will serve the same purpose.

spd_sof 2011-02-01 17:35:13 UTC #10

thank u sir..... for ur help..

I have another ques though...

can we have 2D map declaration's and initializations..i think that would be quite helpful for memoization for [10^9][10^9] dimensions as we clearly cannot make 2d array in c that big..

leppyr64 2011-02-01 17:57:50 UTC #11

Sure you can.

I would make sure that map is goin to be populated sparsely or you will get a runtime error. I would question he solution that used this method however, there may be a simpler way.

spd_sof 2011-02-01 18:00:23 UTC #12

is it given in the link which u gave me.... i.e how to make a 2d map

leppyr64 2011-02-01 18:05:54 UTC #13

You simply create the nested map as the value of the first map.

Map >