Deitel & Deitel, C How to Program 6th Edition, Exercise 10.18 (Portable displayBits Function)

// 10.18 (Portable displayBits Function)

void displayBits(int num) {
int i, mask = 1, intSize;
intSize = sizeof(int) * 8;
mask <<= intSize - 1;
for (i = 1; i <= intSize; i++) {
printf("%d", mask & num ? 1 : 0);
i % 8 ? 0 : printf(" ");
num <<= 1;
}
printf("\n");
}


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