比较判断R-1-12-3强制

禁止浮点数相等比较

应该判断精度误差范围。

浮点数相等比较

test.c

1void foo(float x, float y)
2{
3    int is_equal = x == y;
禁止浮点数相等比较 [gjb8114-r-1-12-3]
4    int is_not_equal = x != y;
禁止浮点数相等比较 [gjb8114-r-1-12-3]
5    int is_zero = x == 0.0;
禁止浮点数相等比较 [gjb8114-r-1-12-3]
6}

浮点数范围比较

test.c

1#include <math.h>
2
3void foo(float x, float y)
4{
5    float error = 1e-6;
6    int is_equal = fabs(x - y) < error;
7    int is_not_equal = fabs(x - y) >= error;
8    int is_zero = fabs(x) < 1e-6;
9}

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