实验1 C语言开发环境使用和编程初体验

实验任务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;
}

#include<stdio.h>
int main()
{
    printf(" O      O\n");
    printf("<H>    <H>\n");
    printf("I I    I I\n");
    return 0;
}

实验任务2

#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;
}

 在math1.cpp中，r4是以十进制整数输出，并且r4的值为0.5，所以输出为0；在math2.cpp中，r4以浮点数输出，所以输出为0.500000

实验任务3

#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;
}

数学运算时均对应代码。在C语言运算中，除法运算符有取整功能

实验任务4

//测试你是哪一类学习者

#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.其他...\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(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(words);
    }
    
    return 0;
}