CSC231 Powers of 2 in C++
--D. Thiebaut 13:43, 8 October 2010 (UTC)
Exercise
- Below is a C++ program, and its complete output
- Explain this output!
The C++ Program
#include <stdio.h>
void main() {
unsigned int x = 1;
while ( x != 0 ) {
printf ( "%u\n", x );
x = x * 2;
}
// printf( "final x = %u\n\n", x );
}
The Output
g++ -o mulby2 mulby2.cpp
./mulby2
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
65536
131072
262144
524288
1048576
2097152
4194304
8388608
16777216
33554432
67108864
134217728
268435456
536870912
1073741824
2147483648