snapshot before regression test

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t
2026-07-18 19:25:40 +08:00
commit 796222a300
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import stdio
import t, c
# ============================================================
# 联合体t.CUnion含浮点字段
# ============================================================
class DataUnion(t.CUnion):
i: t.CInt
f: t.CFloat
l: t.CInt64T
# ============================================================
# 主函数
# ============================================================
def float_test() -> int:
# ============================================================
# 测试 1: 基本浮点变量float / double
# ============================================================
f: t.CFloat = 3.14
stdio.printf("float: f=%f\n", f)
d: t.CDouble = 3.141592653589793
stdio.printf("double: d=%lf\n", d)
# 重新赋值
f = 2.5
stdio.printf("float: f=%f\n", f)
# ============================================================
# 测试 2: 联合体浮点字段
# ============================================================
u: DataUnion
u.f = 3.14
stdio.printf("union: u.f=%f\n", u.f)
# 写入 i 字段后f 的值已被覆盖
u.i = 42
stdio.printf("union: u.i=%d (after f overwritten)\n", u.i)
# ============================================================
# 测试 3: 联合体共享内存验证float 与 int 共享)
# ============================================================
u2: DataUnion
u2.i = 0
u2.f = 1.0
# 写入 f 后i 的值应不再是 0
if u2.i != 0:
stdio.printf("union: float overwrites int verified\n")
# ============================================================
# 测试 4: 浮点算术运算fadd/fsub/fmul/fdiv/frem
# ============================================================
a: t.CFloat = 1.5
b: t.CFloat = 2.5
stdio.printf("arith: %.2f + %.2f = %.2f\n", a, b, a + b)
stdio.printf("arith: %.2f - %.2f = %.2f\n", a, b, a - b)
stdio.printf("arith: %.2f * %.2f = %.2f\n", a, b, a * b)
stdio.printf("arith: %.2f / %.2f = %.2f\n", a, b, a / b)
# ============================================================
# 测试 5: double 算术运算
# ============================================================
x: t.CDouble = 10.0
y: t.CDouble = 3.0
stdio.printf("arith: %.4lf + %.4lf = %.4lf\n", x, y, x + y)
stdio.printf("arith: %.4lf - %.4lf = %.4lf\n", x, y, x - y)
stdio.printf("arith: %.4lf * %.4lf = %.4lf\n", x, y, x * y)
stdio.printf("arith: %.4lf / %.4lf = %.4lf\n", x, y, x / y)
# ============================================================
# 测试 6: 浮点取模 (frem)
# ============================================================
stdio.printf("arith: 10.0 %% 3.0 = %.4lf\n", x % y)
# ============================================================
# 测试 7: int 与 float 混合运算int 自动转 float
# ============================================================
n: t.CInt = 3
stdio.printf("arith: %d + %.2f = %.2f\n", n, a, n + a)
return 0