112 lines
3.1 KiB
Python
112 lines
3.1 KiB
Python
import stdio
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import t, c
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# ============================================================
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# 简单指针 + 逻辑测试
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# ============================================================
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def ptr_test() -> int:
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# 逻辑测试：if 语句
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x: int = 10
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if x:
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stdio.printf("if: x is truthy\n")
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if 1 == 1:
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stdio.printf("if: 1==1 is truthy\n")
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# While 循环 + 累加
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i: int = 0
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total: int = 0
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while i < 5:
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total = total + i
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i = i + 1
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stdio.printf("while: total=%d i=%d\n", total, i)
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# For 循环
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for j in range(5):
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stdio.printf("for: j=%d\n", j)
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# Break 测试
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for k in range(10):
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if k == 3:
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break
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stdio.printf("break: k=%d\n", k)
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# Continue 测试
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for m in range(5):
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if m == 2:
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continue
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stdio.printf("continue: m=%d\n", m)
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# 布尔运算 and（短路求值）
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if x > 5 and x < 100:
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stdio.printf("bool: x>5 and x<100 is true\n")
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# 布尔运算 or（短路求值）
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if x > 100 or x > 5:
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stdio.printf("bool: x>100 or x>5 is true\n")
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# ============================================================
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# 指针 + c.Deref / c.DerefAs 测试
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# ============================================================
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# 字符串遍历: while c.Deref(p) != 0
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s: str = "hello"
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sp: str = s
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slen: int = 0
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while c.Deref(sp) != 0:
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slen = slen + 1
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sp = sp + 1
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stdio.printf("ptr: len(hello)=%d\n", slen)
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# c.DerefAs 写入字符（使用 c.Addr 获取栈变量地址，字符串字面量是只读的）
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v: int = 65 # 'A'
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px: str = c.Addr(v)
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c.DerefAs(px, 88) # *px = 88
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stdio.printf("ptr: after DerefAs v=%d\n", v)
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# 遍历字符串并累加字符值
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p2: str = "ABC"
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total_ch: int = 0
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while c.Deref(p2) != 0:
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total_ch = total_ch + c.Deref(p2)
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p2 = p2 + 1
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stdio.printf("ptr: sum(A,B,C)=%d\n", total_ch)
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# ============================================================
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# c.Load 测试: *a = *b（加载源指针的值，存储到目标指针）
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# ============================================================
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# 基本复制: v2 = v1
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v1: int = 42
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v2: int = 0
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c.Load(c.Addr(v2), c.Addr(v1))
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stdio.printf("ptr: c.Load v2=%d (expected 42)\n", v2)
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if v2 != 42:
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stdio.printf("[FAIL] c.Load expected 42 got %d\n", v2)
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return 1
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# 覆盖已有值: v3 = v4
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v3: int = 100
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v4: int = 200
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c.Load(c.Addr(v3), c.Addr(v4))
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stdio.printf("ptr: c.Load overwrite v3=%d (expected 200)\n", v3)
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if v3 != 200:
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stdio.printf("[FAIL] c.Load overwrite expected 200 got %d\n", v3)
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return 1
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# 验证源不被修改: v5 保持原值
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v5: int = 999
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v6: int = 0
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c.Load(c.Addr(v6), c.Addr(v5))
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stdio.printf("ptr: c.Load src unchanged v5=%d v6=%d (expected 999, 999)\n", v5, v6)
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if v5 != 999:
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stdio.printf("[FAIL] c.Load src changed v5=%d\n", v5)
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return 1
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if v6 != 999:
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stdio.printf("[FAIL] c.Load dst expected 999 got %d\n", v6)
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return 1
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return 0
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