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Anonymous
Quick /g/, find and fix the bug or this bird is gonna stab you! 2016-11-15 03:32:40 Post No.
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Quick /g/, find and fix the bug or this bird is gonna stab you! 2016-11-15 03:32:40 Post No.
[Report] Image search: [Google]
Quick /g/, find and fix the bug or this bird is gonna stab you!
Anonymous
2016-11-15 03:32:40
Post No.
[Report]
#include <stdint.h>
/**
* @param n n
* @return d on success, -1 on failure
*/
int64_t f(uint8_t n)
{
if (n <= 1) return n;
/* if n is greater than 92, fail */
if (n > 92) return -1;
n -= 2;
uint64_t a = 1, b = 1, c = 0, d = 1, e = 1, f = 0;
while (n) {
uint64_t g, h;
if (n & 1) {
g = a * d + b * e;
h = b * d + c * e;
f = b * e + c * f;
d = g;
e = h;
}
g = a * b + b * c;
a = a * a + b * b;
c = b * b + c * c;
b = g;
n >>= 1;
}
/* return d */
return d;
}
>>
>>57519766
I'm not gonna do your homework, kid.
>>
>>57519766
>/**
> * @param n n
> * @return d on success, -1 on failure
> */
What amazingly helpful comments.
Anyway:#include <stdint.h>
int64_t f(uint8_t n)
{
return 'd';
}
>>
>>57519781
please
>>
File: fixed bug.jpg (21KB, 600x399px) Image search:
[Google]
21KB, 600x399px
>>
>>57519766
>Bug
I don't get it. What is the function supposed to do?
>>
>>57519837
are you really that stupid ? how much more comments and well chosen variable name do you need ?
>>
>>57519837
Return d.
>>
>>57519837
He took the effort to show us the original source code, and not the binary file. C'mon dude.
>>
>>57519837
It calculates Fibonacci numbers.
>>
4004b1: 55 push %rbp
4004b2: 48 89 e5 mov %rsp,%rbp
4004b5: 89 f8 mov %edi,%eax
4004b7: 88 45 bc mov %al,-0x44(%rbp)
4004ba: 80 7d bc 01 cmpb $0x1,-0x44(%rbp)
4004be: 77 09 ja 4004c9 <f+0x18>
4004c0: 0f b6 45 bc movzbl -0x44(%rbp),%eax
4004c4: e9 1f 01 00 00 jmpq 4005e8 <f+0x137>
4004c9: 80 7d bc 5c cmpb $0x5c,-0x44(%rbp)
4004cd: 76 0c jbe 4004db <f+0x2a>
4004cf: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax
4004d6: e9 0d 01 00 00 jmpq 4005e8 <f+0x137>
4004db: 80 6d bc 02 subb $0x2,-0x44(%rbp)
4004df: 48 c7 45 f8 01 00 00 movq $0x1,-0x8(%rbp)
4004e6: 00
4004e7: 48 c7 45 f0 01 00 00 movq $0x1,-0x10(%rbp)
4004ee: 00
4004ef: 48 c7 45 e8 00 00 00 movq $0x0,-0x18(%rbp)
4004f6: 00
4004f7: 48 c7 45 e0 01 00 00 movq $0x1,-0x20(%rbp)
4004fe: 00
4004ff: 48 c7 45 d8 01 00 00 movq $0x1,-0x28(%rbp)
400506: 00
400507: 48 c7 45 d0 00 00 00 movq $0x0,-0x30(%rbp)
40050e: 00
40050f: e9 c6 00 00 00 jmpq 4005da <f+0x129>
400514: 0f b6 45 bc movzbl -0x44(%rbp),%eax
400518: 83 e0 01 and $0x1,%eax
40051b: 85 c0 test %eax,%eax
40051d: 74 64 je 400583 <f+0xd2>
40051f: 48 8b 45 f8 mov -0x8(%rbp),%rax
400523: 48 0f af 45 e0 imul -0x20(%rbp),%rax
400528: 48 89 c2 mov %rax,%rdx
40052b: 48 8b 45 f0 mov -0x10(%rbp),%rax
40052f: 48 0f af 45 d8 imul -0x28(%rbp),%rax
400534: 48 01 d0 add %rdx,%rax
400537: 48 89 45 c8 mov %rax,-0x38(%rbp)
40053b: 48 8b 45 f0 mov -0x10(%rbp),%rax
40053f: 48 0f af 45 e0 imul -0
[/code]
>>
>>57519766
Won't puncture skin/10 I hope you don't plan on getting that done by midnight kiddo.
>>
BIRDMIN NO
>>
Fucking shit, return d when n <=1
Idiot
>>57519766
Thread posts: 14
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Thread images: 2