实验一

#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            0 \n");
    printf("<H>          <H>\n");
    printf("I I          I I\n");

    return 0;
}

 

 

#include <stdio.h>
int main() {
    int x, y; 
    int r1, r2, r3, r4;
    x = 1;
    y = 2;
    r1 = x + y;
    r2 = x - y;
    r3 = x * y;
    r4 = x / y;
    printf("r1 = %d\n", r1); 
    printf("r2 = %d\n", r2);
    printf("r3 = %d\n", r3); 
    printf("r4 = %d\n", r4); 
    return 0;
}

 

 

#include <stdio.h>
int main() {
    float x, y; 
    float r1, r2, r3, r4;
    x = 1;
    y = 2;
    r1 = x + y;
    r2 = x - y;
    r3 = x * y;
    r4 = x / y;
    printf("r1 = %f\n", r1); 
    printf("r2 = %f\n", r2);
    printf("r3 = %f\n", r3); 
    printf("r4 = %f\n", r4); 
    return 0;
}

 

 

#include <stdio.h>
int main() {
int n, r1, r2, r3, r4;
n = 100;
r1 = n*(n+1)/2;
r2 = (n+1)*n/2;
r3 = n/2*(n+1);
r4 = (n+1)/2*n;
printf("n = %d\n", n);
printf("r1 = %d\n", r1);
printf("r2 = %d\n", r2);
printf("r3 = %d\n", r3);
printf("r4 = %d\n", r4);
return 0;
}

 

 

#include <stdio.h>
int main() {
int n, r1, r2, r3, r4;
n = 101;
r1 = n*(n+1)/2;
r2 = (n+1)*n/2;
r3 = n/2*(n+1);
r4 = (n+1)/2*n;
printf("n = %d\n", n);
printf("r1 = %d\n", r1);
printf("r2 = %d\n", r2);
printf("r3 = %d\n", r3);
printf("r4 = %d\n", r4);
return 0;
}

 原计算得整形，与小数矛盾

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main()
{
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;
    scanf("%d%d%d", &a1, &a2, &a3);
    printf("%d,%d,%d\n", a1, a2, a3);
    scanf("%c%c%c", &c1, &c2, &c3);
    printf("%c%c%c\n", c1, c2, c3);
    scanf("%lf%lf", &x, &y);
    printf("%lf,%lf\n", x, y);
    system("pause");
    return 0;
}

 

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a1, a2;
    char c1, c2;
    scanf("%d%c%d%c", &a1, &c1, &a2, &c2);
    printf("a1=%d,a2=%d\n", a1, a2);
    printf("c1=%c,c2=%c\n", c1, c2);
    system("pause");
    return 0;
}

 

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
    int answer;
    char words[5000];
    printf("网课学习让一些人欢喜一些人忧.\n");
    printf("1.作为一个宅，社恐，觉得这样很好.有网络，自主学习，很ok.\n");
    printf("2.不喜，不喜，很不喜，眼睛快瞎了，脑壳有点卡...\n");
    printf("3.中间派,不知道,说不清.\n");
    printf("4.其它...\n");
    printf("你的选择：");
    scanf("%d", &answer);
    if (answer == 4)
    {
        printf("请补充说明你的想法：\n");
        getchar();
        gets_s(words);
    }
    printf("\n");
    printf("当遇到问题时，你会选择：\n");
    printf("1.遇到问题，就解决问题，不懂的，搜索式学习，逐个攻破.\n");
    printf("2.遇到问题，不高兴。然后...没有了.\n");
    printf("3.其它...\n");
    printf("你的选择：");
    scanf("%d", &answer);
    if (answer == 1)
        printf(":)\n");
    else if (answer == 2)
        printf("这样不能解决问题啊...我们选择1好不好:)\n");
    else if (answer == 3)
    {
        printf("请补充说明你的想法：\n");
        getchar();
        gets_s(words);
    }
    return 0;
}