program prints "2" Here sizeof returns unsigned int value so

int array[]={1,2,3,4,5,6,7,8};
#define SIZE (sizeof(array)/sizeof(int))
main()
{
if(-1<=SIZE) printf("1");
else printf("2");
}

Question Posted / c.p.senthil

2 Answers
28057 Views
Vector, I also Faced
E-Mail Answers

Answer Posted / c.p.senthil

program prints "2"

Here sizeof returns unsigned int value
so sizeof(array)/sizeof(int)
=> 32(unsigned int)/4(unsigned int)
=> 8 (unsigned int value)

During comparison, the datatypes are different on both sides of if condition
-1(signed int) <= 8(unsigned int)

so by rule of type conversion in c,
signed int gets converted to unsigned int

hence expression becomes
0xFFFFFFFF(unsigned int equivalent of -1) <= 8(unsigned int)

Hence overall condition becomes FALSE

Is This Answer Correct ?

72 Yes

6 No

Post New Answer View All Answers

Please Help Members By Posting Answers For Below Questions

difference between Low, Middle, High Level languages in c ?

2035

What is the difference between constant pointer and constant variable?

1179

c language interview questions & answer

1914

I need a sort of an approximate strcmp routine?

993

What's the total generic pointer type?

1019

How can I get back to the interactive keyboard if stdin is redirected?

1146

What is function prototype in c language?

992

What are header files in c programming?

1089

I have written a pro*C program to fetch data from the cursor. where in i have used the concept of BULK FETCH.... each FETCH statement is taking lots of time to fetch specified number of rows at...

10157

What is c preprocessor mean?

1256

What standard functions are available to manipulate strings?

1094

can anyone please tell about the nested interrupts?

2076

Explain how can I prevent another program from modifying part of a file that I am modifying?

1046

Whats s or c mean?

963

I need previous papers of CSC.......plz help out by posting them.......

2256