error discription:
.cpp::: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses]
if (data_cur[j] == & data_pre[j] == ) temp.at<uchar>(i, j) =
why:
该警告希望你在&(逻辑与)表达式左右加上括号。有的时候&&(逻辑且)少写了一个&，也会产生该警告。
因为&运算符的优先级较低，低于==和！=运算符。
if ( (data_cur[j] == ) && (data_pre[j] == ) ) temp.at<uchar>(i, j) = ;
RE
1.cnblogs-here;
End