https://www.cnblogs.com/CoderAyu/p/11489577.html
float只能保证7位有效数字。
double d = 8345933;
float f = (float)d;//8345933
double d = 83459338;
float f = (float)d;//83459336
https://www.cnblogs.com/CoderAyu/p/11489577.html
float只能保证7位有效数字。
double d = 8345933;
float f = (float)d;//8345933
double d = 83459338;
float f = (float)d;//83459336