实验二
1.getchar&putchar
1 #include<stdio.h> 2 #include<stdlib.h> 3 int main() 4 { 5 char table1, table2, table3, table4, table5; 6 table1 = getchar(); 7 table2 = getchar(); 8 table3 = getchar(); 9 table4 = getchar(); 10 table5 = getchar(); 11 putchar(table1); 12 putchar(table2); 13 putchar(table3); 14 putchar(table4); 15 putchar(table5); 16 system("pause"); 17 return 0; 18 }
演示：
2.闰年判断：
1 #include<stdio.h> 2 #include<stdlib.h> 3 int main() 4 { 5 int year, month, days; 6 printf("input the year:"); 7 scanf_s("%d", &year); 8 month = 2; 9 if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) 10 { 11 days = 29; 12 } 13 else 14 { 15 days = 28; 16 } 17 printf("year:%d ,month:%d,days:%d\n", year, month, days); 18 system("pause"); 19 return 0; 20 }
演示：
输入2000
输入2018
3.判断三角形
1 #include<stdio.h> 2 #include<stdlib.h> 3 int main() 4 { 5 int a, b, c; 6 printf("input three numbers:\n"); 7 scanf_s("%d", &a); 8 scanf_s("%d", &b); 9 scanf_s("%d", &c); 10 if (a + b > c && a + c > b && b + c > a) 11 { 12 if (a == b || a == c || b == c) 13 { 14 if (a == b && b == c) 15 { 16 printf("equilateral triangle\n"); 17 } 18 else if (a * a + b * b == c * c || a * a + c * c == b * b || b * b + c * c == a * a) 19 { 20 printf("isosceles right triangle\n"); 21 } 22 else 23 { 24 printf("isosceles triangle\n"); 25 } 26 } 27 else if(a * a + b * b == c * c || a * a + c * c == b * b || b * b + c * c == a * a) 28 { 29 printf("right triangle\n"); 30 } 31 else 32 { 33 printf("ordinary triangle\n"); 34 } 35 } 36 else 37 { 38 printf("unable to get a triangle\n"); 39 } 40 system("pause"); 41 return 0; 42 }
演示：
3，3，8（无法构成）
3，4，5（直角三角形）
6，6，6（等边三角形）
4.税率计算
1 #include<stdio.h> 2 #include<stdlib.h> 3 int main() 4 { 5 double a, rate, tax, profit; 6 printf("input the date\na="); 7 scanf_s("%lf", &a); 8 if (0 <= a && a < 500) 9 { 10 rate = 0; 11 } 12 else if (500 <= a && a < 1000) 13 { 14 rate = 0.05; 15 } 16 else if (1000 <= a && a < 2000) 17 { 18 rate = 0.08; 19 } 20 else if (2000 <= a && a < 5000) 21 { 22 rate = 0.10; 23 } 24 else if (5000 <= a) 25 { 26 rate = 0.15; 27 } 28 tax = a * rate; 29 profit = a - tax; 30 printf("a=%lf\nrate=%lf\ntax=%lf\nprofit=%lf\n", a, rate, tax, profit); 31 system("pause"); 32 return 0; 33 }
演示：
a=280
a=512
a=1000
a=4250
a=5000
