实验1_c语言输入输出和简单程序应用编程

#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;
}

#include <stdio.h>
int main()
{
    printf(" O      O\n");
    printf("<H>    <H>\n");
    printf("I I    I I\n");

    return 0;
}

 #define _CRT_SECURE_NO_WARNINGS
 #include <stdio.h>

int main()
{
    float a, b, c;

    scanf_s("%f%f%f", &a, &b, &c);

    if ((a + b) > c && (a + c) > b && (c + b) > a || a == b && b == c)
        printf("能构成三角形\n");
    else
        printf("不能构成三角形\n");

    return 0;

}

 #define _CRT_SECURE_NO_WARNINGS
#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();/*去掉啊有影响*/
    printf("\n动手敲代码实践了没？（输入y或Y表示有，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;
}

 #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);/*地址运算符&*/
    getchar();/*吃掉回车*/
    scanf("%c%c%c", &c1, &c2, &c3);
    printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
    scanf("%lf,%lf", &x, &y);/*f对应float而lf对应double*/
    printf("x = %lf, y = %lf\n", x, y);
    return 0;
}

 #define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
    int year;
    int a,b;
    double minute;
    double hour;
    double day;
    double c;
    a = 1000000000;
    minute = a / 60;
    hour = minute / 60;
    day = hour / 24;
    b = (int)(day / 365);
    c = day / 365;
    if (c - b > 0.5)
        year = b+1;
    else
        year = b;

    printf("10亿秒约等于%d年\n", year);
    return 0;
}

#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;
}

 #define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
    double C, F;
    while (scanf("%lf", &C) != EOF)
    {
        F = C * 9 / 5 + 32;
        printf("摄氏度C=%.2f时，华氏度F=%.2f", C, F);
        printf("\n");
    }
    return 0;
}

 #define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<math.h>
int main() {
    int a, b, c;
    double s, area;
    while (scanf("%d %d %d", &a, &b, &c) != EOF)
    {
        s = (a + b + c) / 2.0;
        area = sqrt(s * (s - a) * (s - b) * (s - c));
        printf("a = %d,b = %d,c = %d,area = %.3lf\n", a, b, c, area);
    }
}