C
10. ***
11. q=35
12. **0****2**
13. *&
14. d=20
15. **1** 16. 0
17. 0.6
18. a=2
19. 234
20. 8,1
三.补充程序
1. 根据输入字符的ASCII码来判别字符的类别。由ASCII码表可知ASCII值小于32的为控制字
符。 在“0”和“9”之间的为数字，在“A”和“Z”之间为大写字母， 在“a”和“z”之 间为小写字母，其余则为其它字符。 #include\ #include\ int main() { char c; printf(\ _____________________________________________ if(c<32) printf(\ _____________________________________________ printf(\ else if _______________________________________ printf(\ else if(c>='a'&&c<='z')
printf(\ ____________________________________________ printf(\ return 0; }
2. 计算器程序。用户输入运算数和四则运算符， 输出计算结果. #include\ int main() { float a,b; ____________________________________________; printf(\ scanf(\ switch(c) { case '+': printf(\ case____________________________________________ printf(\ case '*': printf(\ case '/': ____________________________________________;break; default: printf(\ } return 0; }
3. 输入三个整数，输出最大数和最小数(注：max总是记录最大数，而min总是记录最小数). #include\ int main() { int a,b,c,max,min; printf(\ scanf(\ if(a>b) { _______________________________________ _______________________________________ } else {max=b;min=a;} ____________________________________________ max=c; if(min>c)
_____________________________________ printf(\ return 0; }
4. #include\ int main() { int a; printf(\ scanf(\ _____________________________________________ { case 1:printf(\ _____________________________________________ printf(\ case 3:printf(\ case 4:printf(\ case 5:printf(\ case 6:printf(\ case 7:printf(\ _____________________________________________ printf(\ } return 0; }
5. 判断a>b、a
6. 根据以下函数关系，对输入的每个x值，计算出相应的y值。
#include\ int main ( ) { int x,c,m; float y; scanf(“%d”,&x); _________________________________________c=-1; c=_____________________________________________; switch (c) { case –1 : y=0 ; break ; case 0 : y=x ; break ; case 1 : y=10 ; break ; case 2 : case 3 : y=-0.5*x+20 ; _____________________________________________;
else
