实验1 C语言输入输出和简单程序编写

task1_1

 1 #include <stdio.h>
 2 int main()
 3 {
 4     printf(" O\n");
 5     printf("<H>\n");
 6     printf("I I\n"); 
 7    
 8     printf(" O\n");
 9     printf("<H>\n");
10     printf("I I\n");        
11     return 0;
12 }

task1_2

1 #include <stdio.h>
2 int main()
3 {
4     printf(" O    O\n");
5     printf("<H>  <H>\n");
6     printf("I I  I I\n");
7     return 0;
8 }

task2

 1 #include <stdio.h>
 2 int main()
 3 {
 4 
 5     float a, b, c;
 6     
 7     while(scanf("%f%f%f", &a, &b, &c) != EOF)
 8     if (a+b>c && a+c>b && b+c>a)
 9         printf("能构成三角形\n");
10     else
11         printf("不能构成三角形\n");
12     return 0;
13 }

task3

 1 #include <stdio.h>
 2 int main()
 3 {
 4     char ans1, ans2; 
 5     printf("每次课前认真预习、课后及时复习了没? (输入y或Y表示有，输入n或N表示没有) :");
 6     ans1 = getchar(); 
 7     getchar(); 
 8     printf("\n动手敲代码实践了没? (输入y或Y表示敲了，输入n或N表示木有敲) : ");
 9     ans2 = getchar();
10     if((ans1=='y'||ans1=='Y')&&(ans2=='y'||ans2=='Y'))
11         printf("\n罗马不是一天建成的, 继续保持哦:)\n");
12     else
13         printf("\n罗马不是一天毁灭的, 我们来建设吧\n");
14     return 0;
15 }

去掉line7程序会在第一次输入后直接结束

task4

 1 #include<stdio.h>
 2 int main()
 3 {
 4     double x, y;
 5     char c1, c2, c3;
 6     int a1, a2, a3;
 7     //scanf("%d%d%d",a1,a2,a3);
 8     scanf("%d%d%d", &a1, &a2, &a3);
 9     printf("a1 = %d, a2 = %d, a3 = %d\n", a1, a2, a3);
10     scanf("%c%c%c", &c1, &c2, &c3);
11     printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
12     // scanf("%f,%lf",&x,&y);
13     scanf("%lf,%lf", &x, &y);
14     printf("x = %lf, y = %lf\n", x, y);
15     return 0;
16 }

task5

1 #include <stdio.h>
2 int main()
3 {
4     int year;
5     double a = 1e9;
6     year = a /(365 * 24 * 60 * 60)+0.5;
7     printf("10亿秒约等于%d年\n", year);
8     return 0;
9 }

task6

 1 #include <stdio.h>
 2 #include <math.h>
 3 int main()
 4 {
 5     double x, ans;
 6 
 7     while (scanf("%lf", &x) != EOF)
 8     {
 9         ans = pow(x, 365);
10         printf("%.2f的365次方: %.2f\n", x, ans);
11     }
12     return 0;
13 }

task7

 1 #include <stdio.h>
 2 int main()
 3 {
 4     double C, F;
 5     while (scanf("%lf", &C) != EOF)
 6     {
 7         F = 9.0 / 5 * C + 32;
 8         printf("摄氏度c = %.2lf时,华氏度f = %.2lf\n", C, F);
 9     }
10     return 0;
11 }

task8

 1 #include <stdio.h>
 2 #include <math.h>
 3 int main()
 4 {
 5     int a,b,c;
 6     double s, area;
 7     while (scanf("%d%d%d", &a, &b, &c) != EOF)
 8     {
 9         s = (a + b + c) / 2.0;
10         area = sqrt(s * (s - a) * (s - b) * (s - c));
11         printf("a = %d,b = %d,c = %d,area = %.3lf\n", a, b, c, area);
12     }
13     return 0;
14 }