实验1
task1
#include<stdio.h> int main() { printf(" O\n"); printf("<H>\n"); printf("I I\n"); printf(" \n"); printf(" O\n"); printf("<H>\n"); printf("I I\n"); printf(" \n"); printf(" O O\n"); printf("<H> <H>\n"); printf("I I I I\n"); return 0; }
task2
#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; }
r4不同原因:math1.cpp中各数据都是整形,math2.cpp中各数据都是浮点型
task3
#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; }
数据类型都为整形
当n为偶数时,r3中n/2为整数结果与r1r2一致,r4中(n+1)/2向下取整导致结果不一样
当n为奇数时,r3中n/2不为整数结果与r1r2不一致,r4中(n+1)/2为整数结果与r1r2一样
task4
#define _CRT_SECURE_NO_WARRNINGS #include<stdio.h> int main() { double x, y; char c1, c2, c3; int a1, a2, a3; scanf("%c %c %c", &c1, &c2, &c3); printf("%c,%c,%c\n" ,c1, c2, c3); scanf("%d%d%d", &a1, &a2, &a3); printf("%d,%d,%d\n", a1, a2, a3); scanf("%lf%lf", &x, &y); printf("%lf,%lf", x, y); return 0; }
task5
#define _CRT_SECURE_NO_WARRNINGS #include<stdio.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); return 0; }
task6
#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_s("%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,你会选择:\n"); printf("1.遇到问题,就解决问题,不懂得,搜索式学习,逐个攻破\n"); printf("2.遇到问题,不高兴,然后......就没有了\n"); printf("3.其他...\n"); printf("你的选择:"); scanf_s("%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; }