#include <stdio.h>
#define N 4
int main()
{
int a[N] = { 1, 9, 8, 4 };
char b[N] = { '1', '9', '8', '4' };
int i;
printf("sizeof(int) = %d\n", sizeof(int));
printf("sizeof(char) = %d\n", sizeof(char));
printf("\n");
// 输出一维int数组a中每个元素的地址、值
for (i = 0; i < N; ++i)
printf("%p: %d\n", &a[i], a[i]);
printf("\n");
// 输出一维char数组b中每个元素的地址、值
for (i = 0; i < N; ++i)
printf("%p: %c\n", &b[i], b[i]);
printf("\n");
// 输出数组名a和b对应的值
printf("a = %p\n", a);
printf("b = %p\n", b);
return 0;
}
#include <stdio.h>
#define N 2
#define M 4
int main() {
int a[N][M] = { {1, 9, 8, 4}, {2, 0, 2, 2} };
char b[N][M] = { {'1', '9', '8', '4'}, {'2', '0', '2', '2'} };
int i, j;
// 输出二维数组a中每个元素的地址和值
for (i = 0; i < N; ++i)
for (j = 0; j < M; ++j)
printf("%p: %d\n", &a[i][j], a[i][j]);
printf("\n");
// 输出二维数组a中每个元素的地址和值
for (i = 0; i < N; ++i)
for (j = 0; j < M; ++j)
printf("%p: %c\n", &b[i][j], b[i][j]);
return 0;
}
#include <stdio.h>
#define N 13
int days_of_year(int year, int month, int day);
int main() {
int year, month, day;
int days;
while (scanf_s("%d%d%d", &year, &month, &day) != EOF) {
days = days_of_year(year, month, day);
printf("%4d-%02d-%02d是这一年的第%d天.\n\n", year, month, day, days);
}
return 0;
}
int days_of_year(int year, int mounth, int day)
{
int days,leap;
int a[N] = {0,31,59,90,120,151,181,212,243,273,304,334};
days = a[mounth - 1] + day;
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))
leap = 1;
else
leap = 0;
if (leap == 1 && mounth > 2)
{
days++;
}
return days;
}
#include <stdio.h>
#define N 5
void input(int x[], int n);
void output(int x[], int n);
double average(int x[], int n);
void bubble_sort(int x[], int n);
int main() {
int scores[N];
double ave;
printf("录入%d个分数:\n", N);
input(scores, N);
printf("\n输出课程分数: \n");
output(scores, N);
printf("\n课程分数处理: 计算均分、排序...\n");
ave = average(scores, N);
bubble_sort(scores, N);
printf("\n输出课程均分: %.2f\n", ave);
printf("\n输出课程分数(高->低):\n");
output(scores, N);
return 0;
}
void input(int x[], int n) {
int i;
for (i = 0; i < n; ++i)
scanf_s("%d", &x[i]);
}
void output(int x[], int n) {
int i;
for (i = 0; i < n; ++i)
printf("%d ", x[i]);
printf("\n");
}
double average(int x[], int n)
{
int i, sum=0;
double ave;
for (i = 0; i < n; ++i)
sum += x[i];
ave = sum / n;
return ave;
printf("\n");
}
void bubble_sort(int x[], int n)
{
int i,j,t;
for (i = 0; i < n; ++i)
{
for (j = 0; j < n - i; j++)
{
if (x[j] < x[j + 1])
{
t = x[j];
x[j] = x[j + 1];
x[j + 1] = t;
}
}
}
printf("\n");
}
#include <stdio.h>
#define N 100
void dec2n(int x, int n);
int main() {
int x;
printf("输入一个十进制整数: ");
while (scanf_s("%d", &x) != EOF) {
dec2n(x, 2);
dec2n(x, 8);
dec2n(x, 16);
printf("\n输入一个十进制整数: ");
}
return 0;
}
void dec2n(int n, int m)
{
char ans[100];
char a[16] = { '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' };
int i = 0;
do
{
ans[i++] = n % m;
n = n / m;
} while (n);
for (i--; i >= 0; i--)
printf("%c", a[ans[i]]);
printf("\n");
return 0;
}
#include <stdio.h>
#define N 100
// 函数声明
void func(int x[][N], int n); // 注意:两维数组作为形参的语法
void output(int x[][N], int n); // 注意:两维数组作为形参的语法
int main()
{
int x[N][N];
int i, j, n;
printf("Enter n: ");
while (scanf_s("%d", &n) != EOF) {
func(x, n); // 注意:两维数组作为实参的语法
output(x, n); // 注意:两维数组作为实参的语法
printf("\nEnter n: ");
}
return 0;
}
// 函数定义
// 功能:输出两维数组x中的数据,数据项n行、n列
void output(int x[][N], int n) {
int i, j;
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j)
printf("%5d", x[i][j]);
printf("\n");
}
}
void func(int x[][N], int n)
{
int i, j;
for (i = 0; i < n; i++)
{
for (j = i; j < n; j++)
{
x[i][j] = i + 1;
}
}
for (j = 0; j < n; j++)
{
for (i = j; i < n; i++)
{
x[i][j] = j + 1;
}
}
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#define N 80
int main() {
char views1[N] = "hey, C, I have not love u yet.";
char views2[N] = "hey, C, how can I love u?";
char t[N];
printf("交换前: \n");
printf("views1: %s\n", views1);
printf("views2: %s\n", views2);
// 交换
strcpy(t, views1);
strcpy(views1, views2);
strcpy(views2, t);
printf("交换后: \n");
printf("views1: %s\n", views1);
printf("views2: %s\n", views2);
return 0;
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#define N 80
int main() {
char views[2][N] = { "hey, C, I have not love u yet.",
"hey, C, how can I love u?" };
char t[N];
printf("交换前: \n");
printf("views1: %s\n", views[0]);
printf("views2: %s\n", views[1]);
// 交换
strcpy(t, views[0]);
strcpy(views[0], views[1]);
strcpy(views[1], t);
printf("交换后: \n");
printf("views1: %s\n", views[0]);
printf("views2: %s\n", views[1]);
return 0;
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#define N 5
#define M 20
void bubble_sort(char str[][M], int n); // 函数声明
int main() {
char name[][M] = { "Bob", "Bill", "Joseph", "Taylor", "George" };
int i;
printf("输出初始名单:\n");
for (i = 0; i < N; i++)
printf("%s\n", name[i]);
printf("\n排序中...\n");
bubble_sort(name, N); // 函数调用
printf("\n按字典序输出名单:\n");
for (i = 0; i < N; i++)
printf("%s\n", name[i]);
return 0;
}
void bubble_sort(char str[][M], int n)
{
int i, j;
char b[100];
for (int i = 0; i < n; i++)
for (int j = i + 1; j < n; j++)
{
if (strcmp(str[i], str[j]) > 0)
{
strcpy(b, str[i]);
strcpy(str[i], str[j]);
strcpy(str[j], b);
}
}
}