C语言判断浮点数相等的问题

显示全部楼层 · 2010-6-3 21:49:49

#include"stdio.h"
main()
{
float c;
double la;
double lo;
float a=0.0039;
float d=-0.9347;
float b;
float f1;
float f2;
scanf("%lf",&la);
scanf("%lf",&lo);
if((fabs(la-65.079)<0.001)&&(fabs(lo-63.9775)<0.0001))
{
b=28.4;
f1=8.7;
f2=25.9;

}
c=b+a*f1+d*f2;
printf("%f",c);
}
这个程序有何问题？

千问 · 2010-6-3 21:49:49

#include"stdio.h"#include"math.h"void main(){float c;double la;double lo;double a=0.0039;double d=-0.9347;double b;double f1;double f2;scanf("%lf",&la);scanf("%lf",&lo);if((fabs(la-65.079)<0.001)&&(fabs(lo-63.9775)<0.0001)){ b=28.4; f1=8.7; f2=25.9; }c=b+a*f1+d*f2;printf("%f",c);