全国计算机等级考试二级C语言复习资料Part2.doc

Page 4 辽宁科技大学 黄建 公共信箱: v.c.6@163.com 密码: 123.456 全国计算机等级考试二级C语言考前辅导 选择结构程序设计 Page 3 [2011.3.7]运行时输入12回车，则输出结果为 int x; scanf(%d, x); if (x 15) printf(%d, x - 5); if (x 10) printf(%d, x); if (x 5) printf(%d, x + 5); [2011.3.10]以下程序的运行结果是 int x = 10, y = 20, t = 0; if (x == y) t = x; x = y; y = t; printf(%d %d, x, y); [2008.9.20]以下程序的运行结果是 int a = 10, b = 50, c = 30; if (a b) a = b, b = c; c = a; printf(%d%d%d, a, b, c); [2009.9.17]以下执行效果与其它三个不同的是 A)if (a b) c = a, a = b, b = c; B)if (a b) c = a; a = b; b = c; C)if (a b) { c = a, a = b, b = c; } D)if (a b) { c = a; a = b; b = c; } [2005.4.8]以下程序的运行结果是 int a = 3, b = 4, c = 5, t = 99; if (b a a c) t = a; a = c; c = t; if (a c b c) t = b; b = a; a = t; printf(%d%d%d, a, b, c); 以下程序的运行结果是 int a = 3; if (a-- 3) printf(%d\n, a); else printf(%d\n, --a); 以下程序的运行结果是 int a = 0, b = 2, c = 6; if (c = a != 0) printf(%d, a++ + ++c); else printf(%d, b-- - --c); [2005.9.7]以下程序的运行结果是 int a = 1, b = 2, c = 3; if (c = a) printf(%d, c); else printf(%d, b); [2009.3.18]若有定义int x; 则以下程序运行时，x的值在哪个范围才会有输出结果 if (x = 3) ; else if (x != 10) printf(%d, x); A)不等于10 B)大于3或等于10 C)小于3 D)大于3且不等于10 [2006.4.31]以下程序的运行结果是 int a = 0, b = 0, c = 0, d = 0; if (a = 1) b = 1; c = 2; else d = 3; printf(%d%d%d%d, a, b, c, d); A)0120 B)0003 C)1120 D)编译有错 程序运行后a、b、c、d的值分别是 int a = 1, b = 2, c = 3, d = 0; if (a == 1 b++ == 2) if (b != 2 || c-- != 3) d = 1; else d = 2; [2010.9.18][2011.3.27]以下程序的运行结果是 int a = 1, b = 0; if (!a) b++; else if (a == 0) if (a) b += 2; else b += 3; printf(%d\n, b); [2011.9.18]以下程序运行后，b的值是 int a = 1, b = 0; if (--a) b++; else if (a == 0) b += 2; else b += 3; 以下程序的运行结果是 int a = 10; if (a = 20) printf(%d, a = 20); else printf(%d, a != 10); [2010.3.7]以下程序运行后，d的值是 int a = 1, b = 2, c = 3, d = 0; if (a == 1) if (b != 2) if (c == 3) d = 1;