实验二
#include <stdio.h> int main() { int num; scanf("%d",& num); printf("2049%04d\n",num); scanf("%d",& num); printf("2049%04d\n",num); scanf("%d",& num); printf("2049%04d\n",num); return 0; }
#include <stdio.h> #define _CRT_SECURE_NO_WARNINGS int main() { int num; while (1) { scanf_s("%d", &num); printf("2049%04d\n", num); } return 0; }
#include <stdio.h> int main() { char ans1, ans2; printf("复习了没? (输入y或Y表示复习了,输入n或N表示没复习) : "); ans1 = getchar(); getchar(); printf("\n动手敲代码了没? (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("\n罗马不是一天建成的:)\n"); else printf("\n罗马不是一天毁灭的。。。\n"); return 0; }
#include <stdio.h> int main() { char x; x = getchar(); if (x >= '1' && x < '9') printf("%c是数字字符\n", x); else if (x >= 'a' && x < 'z' || x >= 'A' && x < 'Z') printf("%c是英文字母\n", x); else printf("%c是其它字符\n", x); return 0; }
#include <stdio.h>
int main()
{
int n, a, j, x;
float sum;
while (scanf_s("%d%d", &n, &a) != EOF) {
j = 1;
sum = 0;
for (x = a; j <= n; j++) {
sum += j / (float)x;
x = x * 10 + a;
}
printf("n=%d,a=%d,sum=%f", n, a, sum);
}
return 0;
}
#include <stdio.h> #include <stdlib.h> #include <time.h> const int N = 5; int main() { int x, n; srand(time(0)); for (n = 1; n <= N; n++) { x = rand() % 100; printf("%3d", x); } printf("\n"); return 0; }
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
int x, y, n;
srand(time(0));
y = rand() % 31;
n = 1;
printf("猜猜2021年12月哪一天是你的lucky day\n");
printf("开始喽,你有三次机会,猜吧(1~31):");
while (n <= 3)
{
scanf_s("%d", &x);
if (x < y)
printf("你猜的日期早了,lucky day还没到呢\n再猜(1~31):");
else if (x > y)
printf("你猜的日期晚了,lucky day悄悄溜到前面啦\n再猜(1~31)");
else
printf("bingo\n");
n++;
}
printf("次数用完啦。偷偷告诉你:12月,你的lucky day是%d号", y);
return 0;
}
#include <stdio.h> int main() { int i, n; i = 1; scanf("%d", &n); while (i <= n) { printf(" O \n"); printf("<H>\n"); printf("I I\n"); printf("\n"); i++; } return 0; }
#include<stdio.h> int main() { int i, n; scanf("%d", &n); for (i = 1; i <= n; i++) { printf(" O\t"); } printf("\n"); for (i = 1; i <= n; i++) { printf("<H>\t"); } printf("\n"); for (i = 1; i <= n; i++) { printf("I I\t"); } printf("\n"); return 0; }
#include<stdio.h> int main() { int n, i, a, j; scanf_s("%d", &n); for (j = 0; j < n; j++) { for (a = 0; a < j; a++) { printf("\t"); } for (i = 0; i < 2 * n - 1 - 2 * j; i++) { printf(" o \t"); }printf("\n"); for (a = 0; a < j; a++) { printf("\t"); } for (i = 0; i < 2 * n - 1 - 2 * j; i++) { printf("<H>\t"); }printf("\n"); for (a = 0; a < j; a++) { printf("\t"); } for (i = 0; i < 2 * n - 1 - 2 * j; i++) { printf("I I\t"); }printf("\n"); } return 0; }