关于float类型比较的问题

 

http://topic.csdn.net/t/20051015/21/4328916.html

 

#include <stdio.h> main() { float a=3.1415,b=3.1415; printf("%d/n",a==b); printf("%d/n",a==3.1415); }

 

输出结果是1     0 

3.1415是double类型的，改成   
printf("%d/n",a==3.1415f);   

就是1   1了

 

An   unsuffixed   floating   constant   has   type   double.   If   suffixed   by   the   letter   f   or   F,   it   has   type   float.   If   suffixed   by   the   letter   l   or   L,   it   has   type   long   double.