what's wrong with the code below?

[ravikiran7]

the result i am getting is not correct.And i do not know where the mistake is.. please help me.

          #include <stdio.h>
		#include <ctype.h>
		int fun(int *v,int *r);
		main()
		{
		static int v[1][3]={{740,10,0}};
		static int r[1][3]={{20000,10000,0}};
		int result;
		result=fun(&v[0][0],&r[0][1]);
		printf("the result is %d",result);
		return 0;
		}
		int fun(int *v,int *r)
		{
		int temp;
		temp=*v * *r;
		return (temp);
		}

the output of above is :-
the result is -5568.

[weaknessforcats]

I'm using Visual Studio.NET 2008 and I get 7400000 from the above code which looks to be correct.

What compiler are you using?

[ravikiran7]

Thanks for such a quick reply.I am using Turbo c++

[divideby0]

You're probably dealing with overflow; try using long instead of int; or if you're only dealing with positive values, maybe unsigned long. limits.h will allow you to see what sizes turbo uses; for example

#include <stdio.h>
#include <limits.h>

int main(void)
{
   printf("int max = %d\nunsigned int = %u\n",
       INT_MAX, UINT_MAX);
   printf("long max = %ld\nunsigned long max = %lu", 
       LONG_MAX, ULONG_MAX);
   return 0;
}

[ravikiran7]

i changed the datatype to unsigned long int.but could not resolve it.I am putting the code here.help me to resolve it.

	#include <stdio.h>
		#include <ctype.h>
      
		unsigned long int fun(unsigned long int *v,unsigned long int *r);
		main()
		{
		static unsigned  long int v[1][3]={{740,10,0}};
		static unsigned long int r[1][3]={{20000,10000,0}};
		 unsigned long int result;
		result=fun(&v[0][0],&r[0][1]);
		printf("the result is %d",result);
		return 0;
		}
		unsigned long int fun(unsigned long int *v,unsigned long int *r)
		{
		unsigned long int temp;
		temp=*v * *r;
		return (temp);
		}

still getting the same output.

[weaknessforcats]

So what is the sizeof(int) on your Turbo C++?

[donbock]

You have one more int to change to an unsigned long int. On line 11, change "%d" to "%uld".

[donbock]

My mistake, make that "%lu"

[divideby0]

@wfc, I think it's 2. On my machine, the same output can be replicated in VCE 2008 using shorts.

[weaknessforcats]

If it is 2 then overflow occurs at 32768. Way too small to hold 7400000 which would explain the odd output.

[ravikiran7]

thanks for such awesome support.I compiled and runned the same code on linux.it worked perfectly.
the problem is overflow.
my special thanks to everyone.