函数与指针
#include <stdio.h>double min(double x, double y);void chline(char ch[], int i, int j);void to_binary(int i);long fibonacci(int n);void swap(int* a, int* b);int main(){ printf("计算最小值(2.0,2.01) = %5.2f \n", min(2.0, 2.01)); char ss[50] = "beautiful"; printf("指定输出 beautiful 1,3 = "); chline(ss, 1, 3); printf("\n 10进制转2进制: 100 ="); to_binary(100); printf("\n 打印斐波那契数列第n个:"); long fb = fibonacci(5); printf("fb = %ld \n ", fb); printf("通过指针交换 \n"); int a = 1, b = 2; printf("before, a=%d ,b=%d \n", a, b); swap(&a, &b); printf("after , a=%d ,b=%d \n", a, b); return 0;}double min(double x, double y){ return x < y ? x : y;}void chline(char ch[], int i, int j){ for (; i <= j; i++) { printf("%c", ch[i]); } printf("\n");}void to_binary(int i){ int mod = i % 2; int shang = i / 2; if (1 == shang)printf("%d", shang); else if (shang > 1)to_binary(shang); printf("%d", mod);}long fibonacci(int n){ if (n > 2) return fibonacci(n - 1) + fibonacci(n - 2); return 1;}void swap(int * a, int * b){ int* temp; temp = *a; *a = *b; *b = temp;}数组与指针
#include <stdio.h>printf_array(int array[][3], int row, int col);printf_vla(int rows, int cols, int ar[rows][cols]); // 变长数组VLA ,C99支持int main(){ int days[] = { 1,3,10 }; for (int i = 0; i < sizeof days / sizeof days[0]; i++) printf("index : %d , value : %d \n", i, days[i]); int matrix1[2][3] = { {1,2,3}, {1,4,3} }; // 二维数组打印 printf_array(matrix1, 2, 3); return 0;}printf_array(int array[][3], int row, int col){ for (int i = 0; i < row; i++) { for (int j = 0; j < col; j++) { printf("%d,", *(*(array + i) + j)); } printf("\n"); }}一个人身边的位置只有这么多，
