实验四数组应用编程
#include <stdio.h> #include<stdlib.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); system("pause"); return 0; }
#include <stdio.h> #include<stdlib.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]); system("pause"); 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 month, int day) { int days = 0, ans; int a[N] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 }; for (int i = 1; i < month; i++) { if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { a[2] = 29; } days = days + a[i]; }ans = days + day; return ans; }
#include<stdio.h> #include<stdlib.h> #define N 5 // 函数声明 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); system("pause"); return 0; } // 函数定义 // 输入n个整数保存到整型数组x中 void input(int x[], int n) { int i; for (i = 0; i < n; ++i) scanf_s("%d", &x[i]); } // 输出整型数组x中n个元素 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 sum = 0; double ans; int i; for (i = 0; i < n; i++) { sum = sum + x[i]; } ans = 1.0 * sum / n; return ans; } void bubble_sort(int x[], int n) { int t; for (int j = 0; j < n; j++) { for (int i = 0; i < n - j - 1; i++) { if (x[i] < x[i + 1]) { t = x[i]; x[i] = x[i + 1]; x[i + 1] = t; } } } }
#include <stdio.h> #define N 100 void dec2n(int x, int n); // 函数声明 int main() { int x; printf("输入一个十进制整数: "); while (scanf_s("%d", &x) != EOF) { dec2n(x, 2); // 函数调用: 把x转换成二进制输出 printf("\n"); dec2n(x, 8); // 函数调用: 把x转换成八进制输出 printf("\n"); dec2n(x, 16); // 函数调用: 把x转换成十六进制输出 printf("\n"); printf("\n输入一个十进制整数: "); } return 0; } void dec2n(int x, int n) { char c[100] = { 0 }; int i = 0, z; char y[17] = { '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' }; while (x != 0) { z = x % n; c[i++] = y[z]; x /= n; }i--; while (i >= 0) { printf("%c", c[i]); i--; } return; }
#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"); } } // 函数定义 // 功能:生成n行n列的左上拐矩阵,保存在两维数组x中 void func(int x[][N], int n) { int i, j; for (i = n - 1; i >= 0; i--) { for (j = n - 1; j >= 0; j--) { x[i][j] = i + 1; x[j][i] = x[i][j]; } } }
#include<stdio.h> #include<string.h> #include<stdlib.h> #define N 80 int main() { char views1[N] = "hey, c, I have not love you yet."; char views2[N] = "hey, c, how can I love you?"; 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); system("pause"); return 0; }
#include <stdio.h> #include <string.h> #include<stdlib.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]); system("pause"); return 0; } //函数定义 //功能:使用冒泡排序法对二维数据str中的n个字符串按字典序排序 void bubble_sort(char str[][M], int n) { int i,j; char x[100]; for(j=0;j<N-1;j++) for(i=0;i<N-j-1;i++) if(strcmp(str[i],str[i+1])>0) { strcpy(x,str[i]); strcpy(str[i],str[i+1]); strcpy(str[i+1],x); } }