字节shifitng int为4个字节后，如何切换回int（C）

Question

So I byte shift a integer into 4 bytes of data.

img[4] = (imagewidth >> 24) & 0xFF;
img[5] = (imagewidth >> 16) & 0xFF;
img[6] = (imagewidth >> 8) & 0xFF;
img[7] = imagewidth & 0xFF;

img[8] = (imageheight >> 24) & 0xFF;
img[9] = (imageheight >> 16) & 0xFF;
img[10] = (imageheight >> 8) & 0xFF;
img[11] = imageheight & 0xFF;

Now how would I go about shifting it back to an integer. so img[8] - img[11] back to a single int or img[4] - img[7] back to a single int

Answer 1

imagewidth = img[4] << 24 | img[5] << 16 | img[6] << 8 | img[7];
imageheight = img[8] << 24 | img[9] << 16 | img[10] << 8 | img[11];