C语言第4章习题解答.pdf

第第 4 章习题参考答案章习题参考答案 1 单项选择题 单项选择题 1 D 2 D 3 D 4 B 5 D 6 B 7 A 8 D 9 C 10 D 11 B 12 D 13 A 14 B 2 填空题 填空题 1 2 2 嵌套 递归 3 全局变量 局部变量 静态变量 动态变量 4 auto static register extern 5 外部变量 6 编译 运行 3 阅读程序 指出结果 阅读程序 指出结果 1 15 2 5 3 5 4 3 4 i 5 i 2 i 2 i 4 i 2 5 求水仙花数 6 5 5 5 7 30 8 0 10 1 11 2 12 4 程序填空 程序填空 1 float fun float float x y x y z y z y 2 x x x 1 3 s 0 a a b 5 编程题 编程题 1 include unsigned int fun unsigned int int main unsigned int s scanf u printf u n fun s return 0 unsigned int fun unsigned int s unsigned int p 0 while s 0 p p s 10 s s 10 return p 2 include include include void f1 float float float float void f2 float float float float void f3 float float float float int main float a b c d scanf f f f if a 0 printf 不是一元二次方程 n exit 0 d b b 4 a c if d 0 f1 a b c d else if d 0 f2 a b c d else f3 a b c d return 0 void f1 float a float b float c float d float x1 x2 x1 b sqrt d 2 a x2 b sqrt d 2 a printf 2f 2f n x1 x2 void f2 float a float b float c float d float x1 x2 x1 b 2 a x2 b 2 a printf 2f 2f n x1 x2 void f3 float a float b float c float d float x1 x2 x1 b 2 a x2 sqrt d 2 a printf 2f i 2f n x1 x2 printf 2f i 2f n x1 x2 3 include double p int double int main int n double x do scanf d while n 0 scanf lf printf lf n p n x return 0 double p int n double x double pn if n 0 pn 1 else if n 1 pn x else pn 2 n 1 x p n 1 x n 1 p n 2 x n return pn 4 include define RATE 0 053 double fun float void display float int int main float dep int season scanf f d display dep season return 0 double fun float d return d RATE void display float d int s int i printf 季度 利息 余额 n printf n for i 1 i s i printf 4d 2f 2f n i fun d fun d i d printf n 5 include double fun void int main printf lf n fun return 0 double fun void double s 0 int n 1 while double 2 n 1 2 n 2 n 1e 4 s s double 2 n 1 2 n 2 n n return s 6 include int fun int int main int w scanf