feat: add benchmark-programs — 58 telecom COBOL test programs

作为子目录纳入系统，与核心测试管道协同 Co-Authored-By: Claude <noreply@anthropic.com>
2026-06-25 09:53:21 +08:00
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+# Numeric Precision and Arithmetic
+
+## Test Cases
+
+| Test ID | Description |
+|---------|-------------|
+| NP-N001 | COMP-3 decimal alignment (123.45 + 67.89) |
+| NP-N002 | ROUNDED option (10/3, 10/6) |
+| NP-N003 | ON SIZE ERROR trap |
+| NP-N004 | DIVIDE REMAINDER (with quotient and remainder) |
+| NP-N005 | COMP binary sign (negative, min value) |
+| NP-N006 | COMPUTE intermediate precision (large decimal) |
+| NP-N007 | Zero divide (ON SIZE ERROR trap) |
+| NP-A001 | Complex decimal expression |
+| NP-A002 | ON SIZE ERROR with COMPUTE |
+| NP-A003 | Mixed arithmetic operations |
+
+## Features Covered
+- Decimal alignment with PIC 9(n)V99
+- ROUNDED clause on arithmetic
+- ON SIZE ERROR exception handling
+- DIVIDE...REMAINDER
+- USAGE COMP signed binary
+- COMPUTE with large intermediate values
+- Zero-divide trapping
+
+## Expected Results
+All 10 tests should display PASS.