遍历字符串内容，满足条件放入储存的字符串中

参考代码:

#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>

#include<string.h>

#include<assert.h>

void Changestring(char *dest,char*res)

{

assert(dest && res);//多用assert，增强健壮性，避免传入空指针

int sz = strlen(res);

int j = 0;//标记dest中当前的元素

for (int i = 0; i < sz; i++)

{

if (res[i] == 'a' || res[i] == 'A' ||

res[i] == 'e' || res[i] == 'E' ||

res[i] == 'i' || res[i] == 'I' ||

res[i] == 'o' || res[i] == 'O' ||

res[i] == 'u' || res[i] == 'U')

{

dest[j] = res[i];

j++;

}

}

}

int main()

{

char arr[30] = {0};

char input[30] = {0};

gets(arr);//vs环境下需要改成gets_s

Changestring(input, arr);

printf("%s\n", input);

return 0;

}