函数将用户输入并将其添加到数组

Question

我有一个作业问题来完成此方法。我真的不知道该怎么做。鉴于此psuedocode可以有人帮我写这种方法？

/* 
    make a new array of the old size plus the new size 
    copy from the old to the new 
    add the new characters 
    don't forget to clean up the old array (free it) 
    before you leave this function 
*/ 

char * add(char * array, int num) 
{ 
    return array; 

} 

Answer 1

由于这是C，看看realloc - 但你还需要有旧的尺寸参数（或者使用strlen）

Answer 2

下面是一个伪代码：

char * add(char * old_array, int old_size, char *additions, int new_size) 
{ 
    malloc new_size bytes and assign to new_array 
    memcpy old_size bytes from old_array into the new_array 
    add additions into new_array starting from (new_array+old_size) 
    free the old_araray 
    return new_array; 

}