stem(Y) plots the data sequence Y as stems from the x axis terminated with circles for the data value. If Y is a matrix then each column is plotted as a separate series. stem(X,Y
计算 1 的位数population function。例如,数字 37 的二进制形式是 100101,所以它包含有三个设置成 1 的位。一个计算 32 位整数中 1 的位数的简单c语言程序是: int count_ones(unsigned int x) { int i, result = 0; for(i=0;