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方便输入大数\n  - 进行表达式嵌套\n\n```bash\n~/cPro/CHomework(master) » ./DAC mul $(printf '1%.0s' {1..2000}) $(printf '1%.0s' {1..1000})\n12345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012\n34567901234567901234567901234567901234567901234567901234567901234567901234567901234567901234\n56790123456790123456790123456790123456790123456790123456790123456790123456790123456790123456\n79012345679012345679012345679012345679012345679012345679012345679012345679012345679012345679\n01234567901234567901234567901234567901234567901234567901234567901234567901234567901234567901\n23456790123456790123456790123456790123456790123456790123456790123456790123456790123456790123\n45679012345679012345679012345679012345679012345679012345679012345679012345679012345679012345\n67901234567901234567901234567901234567901234567901234567901234567901234567901234567901234567\n90123456790123456790123456790123456790123456790123456790123456790123456790123456790123456790\n12345679012345679012345679012345679012345679012345679012345679012345679012345679012345679012\n34567901234567901234567901234567901234567901234567901234567901234567901234567901111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111\n11111111111111111111111111111111111111111111111111111111111111111110987654320987654320987654\n32098765432098765432098765432098765432098765432098765432098765432098765432098765432098765432\n09876543209876543209876543209876543209876543209876543209876543209876543209876543209876543209\n87654320987654320987654320987654320987654320987654320987654320987654320987654320987654320987\n65432098765432098765432098765432098765432098765432098765432098765432098765432098765432098765\n43209876543209876543209876543209876543209876543209876543209876543209876543209876543209876543\n20987654320987654320987654320987654320987654320987654320987654320987654320987654320987654320\n98765432098765432098765432098765432098765432098765432098765432098765432098765432098765432098\n76543209876543209876543209876543209876543209876543209876543209876543209876543209876543209876\n54320987654320987654320987654320987654320987654320987654320987654320987654320987654320987654\n32098765432098765432098765432098765432098765432098765432098765432098765432098765432098765432\n0987654320987654320987654320987654320987654320987654321\n\n~/cPro/CHomework(master) » ./DAC mul 5 $(./DAC add 2 $(./DAC mul 3 4))\n70\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fallanchain%2Fchomework","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fallanchain%2Fchomework","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fallanchain%2Fchomework/lists"}