echo I WANT >foo test "$(busybox dd if=foo 2>/dev/null)" = "I WANT"
if 源代码
掌握if条件语句,开启编程逻辑之门。作为电子工程师不可或缺的基础技能之一,if语句在电路设计、嵌入式系统开发及自动化控制中扮演着关键角色。通过灵活运用if结构,您可以实现复杂算法的简化与优化,提升项目效率。无论是初学者还是资深开发者,深入理解if语句的应用都将极大增强您的编程能力…
if (eye (2)) printf ("fail\n"); else printf ("pass\n"); end
x = 2; if (eye (2)) printf ("fail\n"); elseif (x) printf ("pass\n"); endif
x = 0; y = -2; if (eye (2)) printf ("fail\n"); elseif (x) printf ("fail\n"); elseif (y) printf ("pass\n"); end
i = 0; if (i == 0) i++; printf ("%d\n", i); endif
x = 0; y = -2; if (eye (2)) printf ("fail\n"); elseif (x) printf ("fail\n"); elseif (x) printf ("fail\n"); else printf ("p…
x = 0; y = -2; if (y) printf ("pass\n"); elseif (x) printf ("fail\n"); elseif (x) printf ("fail\n"); end
#!/bin/sh # # Copyright (C) 2000, Jonathan S. Shapiro. # # This file is part of the EROS Operating System. # # This program is fre…