CHAR_BIT : It is the number of bits in char. These days, almost all architectures use 8 bits per byte (But it is not the case always, some older machines used to have 7-bit byte). It can be found in
Let us see an application of it. Suppose we wish to print byte by byte representation of an integer.
Examples :
Input : 4 Output : 00000000 00000000 00000000 00000100 Input : 12 Output : 00000000 00000000 00000000 00001100
// CPP program to print byte by byte presentation #include <bits/stdc++.h> using namespace std; // function in which number and intitally 0 is passed void printInBinary(int num) { int n = CHAR_BIT*sizeof(num); stack<bool> s; for (int i=1; i<=n; i++) { s.push(num%2); num = num/2; } for (int i=1; i<=n; i++) { cout << s.top(); s.pop(); // Put a space after every byte. if (i % CHAR_BIT == 0) cout << " "; } } int main() { int num = 12; printInBinary(num); return 0; } |
Output :
00000000 00000000 00000000 00001100
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