task1.1
#include <stdio.h>
int main()
{
printf(" O \n");
printf("<H>\n");
printf("I I\n");
printf(" O \n");
printf("<H>\n");
printf("I I\n");
return 0;
}
task1.2
#include <stdio.h>
int main()
{
printf(" O O \n");
printf("<H> <H>\n");
printf("I I I I\n");
return 0;
}
task2
#include <stdio.h>
int main()
{
float a, b, c;
scanf_s("%f%f%f", &a, &b, &c);
if (a+b>c && a+c>b && b+c>a)
printf("能构成三角形\n");
else
printf("不能构成三角形\n");
return 0;
}
task3
#include <stdio.h>
int main()
{
char ans1, ans2;
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) :");
(ans1) = getchar();
getchar();
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) : ");
ans2 = getchar();
if ((ans1 == 'y'|| ans1=='Y') && (ans2=='y'||ans2=='Y'))
printf("\n罗马不是一天建成的, 继续保持哦:)\n");
else
printf("\n罗马不是一天毁灭的, 我们来建设吧\n");
return 0;
}
当把line7去掉以后,键入回车或第二次输入y或n将直接导致程序结束,getchar()会在用户输入字符后结束执行框,需要line7进行缓冲。
task4
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
double x, y;
char c1, c2, c3;
int a1, a2, a3;
scanf("%d%d%d", &a1, &a2, &a3);
printf("a1 = %d, a2 = %d, a3 = %d\n", a1, a2, a3);
scanf("%c%c%c", &c1, &c2, &c3);
printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
scanf("%lf,%lf", &x, &y);
printf("x=%lf, y=%lf\n",x,y);
return 0;
}
task5
#include <stdio.h>
int main()
{
int year;
year = 1e9 / (60 * 60 * 24 * 365) + 0.5;
printf("10亿秒约等于%d年\n", year);
return 0;
}
task6
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>
int main()
{
double x, ans;
while (scanf("%lf", &x) != EOF)
{
ans = pow(x, 365);
printf("%.2f的365次方: %.2f\n", x, ans);
printf("\n");
}
return 0;
task7
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main() {
double C, F;
while (scanf("%lf", &C) != EOF)
{
F = 9.0 / 5 * C + 32;
printf("摄氏度C=%.2f时,华氏度F=%.2f\n", C, F);
printf("\n");
}
return 0;
}
task8
#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main(){
double area,s;
int a,b,c;
while(scanf("%d%d%d",&a,&b,&c)!=EOF)
{
s = (a+b+c)/2.0;
area = s*(s-a)*(s-b)*(s-c);
area = sqrt(area);
printf("a = %d,b = %d,c = %d,area = %.3f",a,b,c,area);
printf("\n");
}
return 0;
}