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#include <stdio.h>
int main() {
char ch;
printf("请输入一个字符: ");
scanf("%c", &ch);
if (ch >= 'a' && ch <= 'z') {
printf("%c is lower case\n", ch);
} else if (ch >= 'A' && ch <= 'Z') {
printf("%c is upper case\n", ch);
} else if (ch >= '0' && ch <= '9') {
printf("%c is digit\n", ch);
} else {
printf("%c is other char\n", ch);
}
return 0;
}

#include <stdio.h>
int main() {
char ch;
printf("请输入一个字符: ");
scanf("%c", &ch);
if (ch >= 'a' && ch <= 'z') {
printf("%c is lower case\n", ch);
} else if (ch >= 'A' && ch <= 'Z') {
printf("%c is upper case\n", ch);
} else if (ch >= '0' && ch <= '9') {
printf("%c is digit\n", ch);
} else {
printf("%c is other char\n", ch);
}
return 0;
}

#include <stdio.h>
int main() {
printf("A smile can make you ten years younger\n");
printf("A smile can make you ten years younger\n");
return 0;
}

#include <stdio.h>
int main() {
int n;
long long Sn = 0; // 因为阶乘和可能较大，使用long long类型
long long t = 1;
printf("请输入n: ");
scanf("%d", &n);
for (int i = 1; i <= n; i++) {
t = t * i;
Sn = Sn + t;
}
printf("%lld\n", Sn);
printf("姓名：你的姓名 学号：你的学号\n"); // 记得替换为真实信息
return 0;
}

#include <stdio.h>
#include <string.h>
int main() {
char s[1000]; // 用于存储输入的字符串，根据实际情况可调整大小
char c;
int i;
for (int j = 0; j < 2; j++) { // 处理两组测试用例
scanf("%s", s); // 读取字符串
getchar(); // 读取换行符，避免影响下一次输入
scanf("%c", &c); // 读取要查找的字符
int found = 0; // 标记是否找到，初始化为0表示未找到
for (i = 0; i < strlen(s); i++) {
if (s[i] == c) {
found = 1;
break;
}
}
if (found) {
printf("%c is found\n", c);
} else {
printf("%c is not found\n", c);
}
}
return 0;
}

#include <stdio.h>
#include <math.h>
int main() {
int a, n, i;
long long sum = 0, term = 0;
scanf("%d %d", &a, &n);
for (i = 0; i < n; i++) {
term = term * 10 + a;
sum += term;
}
printf("%lld\n", sum);
return 0;
}

#include <stdio.h>
int main() {
int i, hundreds, tens, units;
for (i = 100; i < 1000; i++) {
hundreds = i / 100;
tens = (i % 100) / 10;
units = i % 10;
if (i == hundreds * hundreds * hundreds + tens * tens * tens + units * units * units) {
printf("%d ", i);
}
}
printf("\n");
printf("你的姓名,你的学号\n");
return 0;
}

#include <stdio.h>
int main() {
int a, b, c;
for (int i = 0; i < 4; i++) {
scanf("%d %d %d", &a, &b, &c);
int min = a;
if (b < min) min = b;
if (c < min) min = c;
printf("%d\n", min);
}
printf("张三丰 20223249057089");
return 0;
}

#include <stdio.h>
int main() {
int a, b, c;
scanf("%d %d %d", &a, &b, &c);
int sum_a = 0;
for (int i = 1; i <= a; i++) {
sum_a += i;
}
int sum_b_square = 0;
for (int i = 1; i <= b; i++) {
sum_b_square += i * i;
}
double sum_c_reciprocal = 0;
for (int i = 1; i <= c; i++) {
sum_c_reciprocal += 1.0 / i;
}
double total_sum = sum_a + sum_b_square + sum_c_reciprocal;
printf("%.2f\n", total_sum);
return 0;
}

#include <stdio.h>
int main() {
int m, n, m_original, n_original;
scanf("%d %d", &m, &n);
m_original = m;
n_original = n;
int r;
while (n!= 0) {
r = m % n;
m = n;
n = r;
}
int gcd = m;
int lcm = m_original * n_original / gcd;
printf("%d %d\n", gcd, lcm);
printf("沈珂璇 202400868\n");
return 0;
}

#include <stdio.h>
int main() {
int arr[10];
for (int i = 0; i < 10; i++) {
scanf("%d", &arr[i]); // 读取10个元素
}
for (int i = 0; i < 10; i++) {
arr[i]++; // 每个元素加1
}
for (int i = 0; i < 10; i++) {
printf("%d", arr[i]);
if (i < 9) {
printf(" "); // 除了最后一个元素，每个元素后输出一个空格
}
}
printf("\n"); // 最后输出一个换行
return 0;
}

#include <stdio.h>
int main() {
int N;
double sum = 0.0;
scanf("%d", &N);
for (int i = 1; i <= N; i++) {
sum += 1.0 / i;
}
printf("%.6f\n", sum);
// 在这里输出你的姓名和学号
printf("姓名：沈珂璇 学号：202400868\n");
return 0;
}

#include <stdio.h>
int main() {
int usualScores[5];
int finalScores[5];
int i;
// 输入5个平时成绩
for (i = 0; i < 5; i++) {
scanf("%d", &usualScores[i]);
}
// 输入5个期末成绩
for (i = 0; i < 5; i++) {
scanf("%d", &finalScores[i]);
}
// 计算并输出总成绩
for (i = 0; i < 5; i++) {
int total = (int)(usualScores[i] * 0.4 + finalScores[i] * 0.6);
printf("%d\n", total);
}
return 0;
}

#include <stdio.h>
#include <string.h>
// 声明函数fun，将数字字符串转换为整数
int fun(char *s) {
int num = 0;
int len = strlen(s);
for (int i = 0; i < len; i++) {
num = num * 10 + (s[i] - '0');
}
return num;
}
int main() {
char s[100];
scanf("%s", s);
int result = fun(s);
printf("%d\n", result);
// 打印姓名和学号
printf("沈珂璇 202400868\n");
return 0;
}