C/C++ Programming Help Thread

[hallo007]

i m developing for pc now

#include <cstdlib>
#include <iostream>
#include <conio.h>


using namespace std;

int mult (int x, int y);  //samenbrengen

inline void vermenigvuldigen()
{
   int x;
int y;


cout<<"schrijf een getal voor te vermenigvuldigen/optellen/aftrekken of delen: ";
cin>>x;

cout<<"schrijf een tweede getal om het eerste mee te bewerken ";

cin>>y;
cin.ignore();
cout<<"het produkt van de 2 getallen is "<<mult (x,y)<<"\n";
cout<<"de som van de 2 getallen is "<<x+y<<"\n";
cout<<"het quotient van de 2 getallen is "<<x/y<<"\n";
cout<<"en met aftrekken bekomen we "<<x-y<<"\n";
printf("gemaakt door ROEL\n\n\n\n\n\n\n\n\n");
vermenigvuldigen();
cin.get();
}
int mult (int x, int y)
{
    return x*y;
}    

int main()
{
vermenigvuldigen();
cin.get();
}

the problem is
if you type 999999999999 , the program crashed
what can you do so you cant type it
ps : i tried this already
if (x>99999999){
printf("pleas enter another nuber, it's to big")
vermenigvuldigen();
}

[Moonchild]

The int datatype can't handle that much data, change it to a long or something.

[Waterbottle]

The int datatype can't handle that much data, change it to a long or something.

I thought both a long and int had the same size (4 bytes) on the psp? or have I been misinformed?

I use double for those huge variables.

[hallo007]

cant you block for using to much data???
so i can just use int???
-= Double Post =-

I thought both a long and int had the same size (4 bytes) on the psp? or have I been misinformed?

I use double for those huge variables.

this is for PC
(everbody told me to learn it first on pc and than on psp)

[Waterbottle]

cant you block for using to much data???
so i can just use int???
-= Double Post =-

this is for PC
(everbody told me to learn it first on pc and than on psp)

ah, ok then.

I'm not sure, but maybe you could do:
if((cin>>y)>sizeof(int)) {
//code if to big
} else {
}

that might not work though..

[Moonchild]

No it won't... He wouldn't be able to use the data.

You might want to change it to an unsigned int though.
Or if you want a long long (it can handle values from –9,223,372,036,854,775,80 7 to 9,223,372,036,854,775,807 )

[hallo007]

mayby i can just write an warning
that's easier for me:d

[Vaza]

Could someone tell me if PC SDL and PSP SDL are the same?
thanks.
--Vaza

[Insert_Witty_Name]

Not exactly no.

PSP SDL is slow as some of the rendering is done in software.

[Bronx]

I think he means the functions though... As far as I know the functions should be he same

[psphacker12.]

can someone explain to me the basic func's in C?

[PSP-Maniac]

printf("hello world")
prints hello world on the psp screen.

[Bronx]

printf("hello world")
prints hello world on the psp screen.

um, no it doesnt...
it does if you define it like this

#define printf pspDebugScreenPrintf

and still you didn't clarify the x and y coordinates..

And if you want a full documentation check out this http://psp.jim.sh/pspsdk-doc/

[PSP-Maniac]

um, no it doesnt...
it does if you define it like this

#define printf pspDebugScreenPrintf

and still you didn't clarify the x and y coordinates..

And if you want a full documentation check out this http://psp.jim.sh/pspsdk-doc/

hehe sorry forgot that.

[psphacker12.]

how can you change the text color in C?

[Moonchild]

how can you change the text color in C?

Depends on what you use to print the text...

[psphacker12.]

i use

pspDebugScreenPrintf("wassup homedawg, hows it hangin?")

[Moonchild]

Okay, then you'll have to use the
pspDebugScreenSetTextColo r
function.

Example:

#define RGB(r,g,b) (((b)<<16)|((g)<<8)|(r))

int main(int argc, char **argv)
{
  pspDebugScreenInit();
  pspDebugScreenSetTextColor(RGB(255, 0, 0)); // change color to red
  pspDebugScreenPrintf("Red");
  pspDebugScreenSetTextColor(RGB(0, 255, 0)); // change color to green
  pspDebugScreenPrintf("Green");
  pspDebugScreenSetTextColor(RGB(0, 0, 255)); // change color to blue
  pspDebugScreenPrintf("Blue");
}

[Waterbottle]

If I wanted to change/read a memory address could I do somthing like this
int *pointer = 0x88000000;
?

and how could I do it if the memory address is a pointer to a different address and I wanted the pointer to point to that?

like,
int *pointer = 0x88000000;


0x88000000 is 0x88100004
so the pointer now points to 0x88100004. How should I do that?

[Raphael]

better typecast the address to a pointer (though it should compile with a mere warning without it):
int* pointer = (int*)0x88000000;

To change the pointer, just do
pointer = (int*)0x88100004;

[Art]

Hi Guys,
After a little help with file IO .. writing/reading a file from two different buffers.
Yes I could copy them to a single buffer, and do it the normal way if there
were enough RAM, but there isn't.

	int f;

	f = sceIoOpen("./folder/file.txt", PSP_O_RDONLY, 0777);
	sceIoRead(f,buffer_a,10000);
	sceIoRead(f,buffer_b,20000);
	sceIoClose(f);

I thought the above would work, but it doesn't seem to.. any ideas?
-= Double Post =-
forget it, that IS the right way,
I dunno what I was doing wrong before.

[Jetlitheone]

ok can anyone show me how an hello world is made?

[Moonchild]

Here:
http://www.psp-programming.com/tutorials/c/lesson02.htm

[Jetlitheone]

wow thats hard to understand!
-= Double Post =-
i mean an hello world for the tiff sdk

[Waterbottle]

wow thats hard to understand!
-= Double Post =-
i mean an hello world for the tiff sdk

If you think hello world for the normal sdk is hard then I wouldn't advice you to try it with the tiffsdk

[Jetlitheone]

its harder?

WOAH

[Bronx]

try learning the c language first by going here cprogramming.com

[Grimfate126]

1. hi guys. i need a couple of functions in C. i can seem to find anything.. (literally)

here is what i need: (i think they should all be in one of the libs)

a function that does the sin of something.
a function that does the cosin of something.
a function that does the tangent (tan) of something.

a function that converts degrees to radians


2. ALSO, how would i "blit" a 3D model to the screen using x,y,z positionst? (in 3D)

YES, i have read BILLIONS of tutorials, looked at the samples, BUT, all of them use prespective. i want to actually "blit" a model using x,y, and z coordinates, and be able to change them.

[Moonchild]

1. hi guys. i need a couple of functions in C. i can seem to find anything.. (literally)

here is what i need: (i think they should all be in one of the libs)

a function that does the sin of something.
a function that does the cosin of something.
a function that does the tangent (tan) of something.

a function that converts degrees to radians


2. ALSO, how would i "blit" a 3D model to the screen using x,y,z positionst? (in 3D)

YES, i have read BILLIONS of tutorials, looked at the samples, BUT, all of them use prespective. i want to actually "blit" a model using x,y, and z coordinates, and be able to change them.

C already has built-in functions for sin, cos and tan. You just have to include math.h. The functions are named:

sin();
cos();
tan();

[Grimfate126]

C already has built-in functions for sin, cos and tan. You just have to include math.h. The functions are named:

sin();
cos();
tan();

wat about converting degrees to radians?