实验1

1.

#include <stdio.h>

int main() {

printf("hello, C\n");

return 0;

}

#include <stdio.h>

int main() {
 
 printf("my stuno is:202083450038\n");
 printf("2020,r u crazy\n");
 
 return 0;

}

2.

/* 循环打印字符 */
 #include <stdio.h>
 int main() {
     while(1)
           printf("0 1");
     return 0;
}

 

3.

mach1.cpp

#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;
}

mach2.cpp

#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 = %d\n", r1);
 printf("r2 = %d\n", r2);
 printf("r3 = %d\n", r3);
 printf("r4 = %d\n", r4);
 
 return 0;

}

4.

#include <stdio.h>
int main() {
 int answer;
 char words[5000];
 
 printf("在家上学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.脑壳有点疼...\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(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;
}