task1
#include <stdio.h>
#include <stdlib.h> int main() { printf(" o\n"); printf("<H>\n"); printf("I I\n"); system("pause"); return 0; }
#include <stdio.h> int main() { int n, sum; scanf_s("%d", &n); sum = n * (n + 1) / 2; printf("sum = %d\n", sum);
return 0; }
#include <stdio.h> int main() { int a, b, t; a = 3; b = 4; printf("a = %d, b = %d\n", a, b); t = a; a = b; b = t; printf("a = %d, b = %d\n", a, b); return 0; }
#include <stdio.h> int main() { int x, t, m; x = 654; printf("x = %d\n", x); t = 0; m = x % 10; t = t * 10 + m; x = x / 10; m = x % 10; t = t * 10 + m; x = x / 10; m = x % 10; t = t * 10 + m; x = x / 10; printf("t = %d\n", t); return 0; }
把百位和个位换位
#include <stdio.h> int main() { float a, b, c; scanf_s("%f%f%f", &a, &b, &c); if (((a+b)>c)&&((a+c)>b)&&((b+c)>a)) printf("能构成三角形\n"); else printf("不能构成三角形\n"); return 0; }
#include <stdio.h> int main() { int year; year = 10 ^ 9 / 365 / 24 / 60 / 60; printf("10亿秒约等于%d年\n", year); return 0; }
#include <stdio.h> int main() { int n; srand((unsigned)time(NULL)); n = rand() % 41+60; printf_s("n = %d\n", n); return 0; }
#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(); printf("\n动手敲代码实践了没? (输入y或Y表示敲了,输入n或N表示木有敲) : "); ans2 = getchar(); if ((ans1=='y'||ans1=='Y')&&(ans2=='y'||ans2=='Y')) printf_s("\n罗马不是一天建成的, 继续保持哦:)\n"); else printf_s("\n罗马不是一天毁灭的, 我们来建设吧\n"); return 0; }