Question

int temp1,temp2,temp3;
temp1 = 199;
temp2 = 200;
temp3 = 199%temp2;

CString txt;
txt.Format(_T("temp3 = %d"),temp3);
AfxMessageBox(txt);

Output is 199 as expected.

#define WIDTH 100
#define BUFFERWIDTH 200
int temp1,temp2,temp3;
temp1 = 199;
temp2 = BUFFERWIDTH;
temp3 = 199%BUFFERWIDTH;

CString txt;
txt.Format(_T("temp3 = %d"),temp3);
AfxMessageBox(txt);

Output is 199 as expected.

#define WIDTH 100
#define BUFFERWIDTH 2*WIDTH
int temp1,temp2,temp3;
temp1 = 199;
temp2 = BUFFERWIDTH;
temp3 = 199%BUFFERWIDTH;

CString txt;
txt.Format(_T("temp3 = %d"),temp3);
AfxMessageBox(txt);

Output is 100…

Just wondering what is causing this 🙂

Answer 1

Read up about operator precedence, and note that you are saying 199 % 2 * 100.

.
.
.

or should I say, (199 % 2) * 100…