自己练习写的一点函数
本帖最后由 bin554385863 于 2019-5-29 23:07 编辑#include <stdio.h>
#include <stdlib.h>
/*阶乘函数*/
long long fact(int n)
{
long long fact = 1;
if (n >= 0)
{
if ((n == 0) || (n == 1))
{
fact = 1;
}
else
{
for (int i = 1; i <= n; i++)
{
fact = fact * i;
}
}
return (fact);
}
else
{
return -1;
}
}
/*组合函数*/
long long comb(int n, int k)
{
long long comb = 1;
if ((n > 0) && (k >= 0))
{
if ((n == k) || (k == 0))
{
comb = 1;
}
else if (n > k)
{
comb = fact(n) / (fact(k) * fact(n - k));
}
else
{
return 1;
}
}
else
{
return -1;
}
}
/*用字符e表示一个数字数组的结束,el = endline*/
#define el "'e'"
/*数组长度函数*/
size_t arrlen(size_t arr[])
{
size_t i = 1;
while (*(arr + i) != el)
{
i++;
}
return i;
}
/*冒泡排序函数*/
void arrsrt(size_t arr[])
{
int t;
for (size_t i = 0; i < arrlen(arr); i++)
{
for (size_t j = 0; j < arrlen(arr)-1; j++)
{
if (arr >= arr)
{
t = arr;
arr = arr;
arr = t;
}
}
}
for (size_t i = 0; i < arrlen(arr); i++)
{
printf("%d ", arr);
}
}
/*数组搜索函数*/
void arrsch(size_t arr[], size_t key)
{
size_t temp;
size_t j = 0;
for (size_t i = 0; i < arrlen(arr); i++)
{
if (*(arr + i) == key)
{
temp = i;
j++;
}
}
if (j >= 1)
{
printf("数据%d总共出现了%d次,下标是:", key, j);
for (size_t i = 0; i < j; i++)
{
printf("%02d ", temp);
}
}
else
{
printf("NULL");
}
/*数字数组拼接函数arrcat(arr1, arr2),请确保arr1有足够的空间接受arr2的数据*/
void arrcat(size_t arr1[], size_t arr2[])
{
size_t temp;
size_t i, j, k;
for (i = 0; i < arrlen(arr1); i++)
{
temp = arr1;
}
for (j = 0; j < arrlen(arr2); j++)
{
temp = arr2;
}
for (k = 0; k < i + j; k++)
{
arr1 = temp;
arr1 = el;
printf("%d ", arr1);
}
}
以上的数字数组函数全都是基于arrlen(size_t arr[])函数,实现
============================================================================
#include <stdio.h>
#include "E:\Administrator\Documents\My C\My C Function\Function.c"
void main()
{
int a = {0, 1, 2, 3, el};
int b[] = {7, 5, 8, 4, el};
int c[] = {6, 9, 10, 11, el};
printf("拼接a[]和b[]\n");
arrcat(a, b);
printf("\n\n");
printf("然后拼接c[]\n");
arrcat(a, c);
printf("\n\n");
printf("对数组排序\n");
arrsrt(a);
printf("\n\n");
printf("打印数组长度\n");
printf("%d", arrlen(a));
printf("\n\n");
printf("查找数字8\n");
arrsch(a , 8);
}
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Microsoft Windows [版本 6.1.7601]
版权所有 (c) 2009 Microsoft Corporation。保留所有权利。
E:\Administrator\Documents\My C>cmd /C "c:\Users\Administrator\.vscode\extensions\ms-vscode.cpptools-0.23.1\debugAdapters\bin\WindowsDebugLauncher.exe --stdin=Microsoft-MIEngine-In-asdrue3q.cef --stdout=Microsoft-MIEngine-Out-ply55g5c.jfq --stderr=Microsoft-MIEngine-Error-rxmm5n1v.0hm --pid=Microsoft-MIEngine-Pid-czjei4lx.uno --dbgExe=E:\MinGW\bin\gdb.exe --interpreter=mi "
拼接a[]和b[]
0 1 2 3 7 5 8 4
然后拼接c[]
0 1 2 3 7 5 8 4 6 9 10 11
对数组排序
0 1 2 3 4 5 6 7 8 9 10 11
打印数组长度
12
查找数字8
数据8总共出现了1次,下标是:08
E:\Administrator\Documents\My C>
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