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Give a oneline C expression to test whether a number is a
power of 2?
- 25 Answers
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Answer / dan
if (x & (x-1)) // false only if x is a power of 2
| Is This Answer Correct ? | 102 Yes | 8 No |
Answer / ashutosh
I think
if (x & (x-1)) wont work when number is negative.
| Is This Answer Correct ? | 12 Yes | 10 No |
Answer / fjords
if (int(log(x)) == log(x)) // log is to the base 2
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / rahul priyadarshi
#define ISPOW2(x) ((x==1)?1:(x&(x-1)))?0:1
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / yevgen
if ((num XOR (num - 1)) == num + num - 1) return true;
else return false;
| Is This Answer Correct ? | 1 Yes | 0 No |
print numbers till we want without using loops or condition statements like specifically(for,do while, while swiches, if etc)!
main() { { unsigned int bit=256; printf("%d", bit); } { unsigned int bit=512; printf("%d", bit); } } a. 256, 256 b. 512, 512 c. 256, 512 d. Compile error
const int perplexed = 2; #define perplexed 3 main() { #ifdef perplexed #undef perplexed #define perplexed 4 #endif printf("%d",perplexed); } a. 0 b. 2 c. 4 d. none of the above
Write a program using one dimensional array to assign values and then display it on the screen. Use the formula a[i]=i*10 to assign value to an element.
1 Answers Samar State University,
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How to swap two variables, without using third variable ?
104 Answers AB, ADP, BirlaSoft, Cisco, Cygnet Infotech, HCL, Hewitt, Honeywell, HP, IBM, Infosys, Manhattan, Microsoft, Mobius, Percept, Satyam, SofTMware, TCS, Wipro, Yamaha,
#include<stdio.h> main() { FILE *ptr; char i; ptr=fopen("zzz.c","r"); while((i=fgetch(ptr))!=EOF) printf("%c",i); }
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program to find the roots of a quadratic equation
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Design an implement of the inputs functions for event mode
What is the main difference between STRUCTURE and UNION?
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