OK,我會建議你做一些更有效的,並且是使用雙指針。通過這樣做,您可以解決2D陣列版本中存在的一些問題。
第一個問題是,如果用戶想要插入超過999個糖果,你會怎麼做。你的數組不能容納它們。
其次,如果用戶輸入大於100個字符的名稱,你會怎麼做。再一次,你的二維數組不能容納它。而且,儘管用戶可能輸入大於100個字符的名稱,但大多數用戶的輸入會比這個少得多,現在對於每個字符串,當您可能只需要大約50個時,就會分配100個位置。
因此,讓我們來處理這些問題。 我可能會做這樣的事情:
#include <stdio.h>
#include <string.h> // for strcpy(), strlen()
#include <stdlib.h> // for malloc()
int main(void) {
char **sweet_names; // make a double pointer(or you might see that as array of pointers
char reader[300]; // this variable will help us read every name into the sweet_names
int sweet_number;
int i, j;
// Your code here to get the number of sweet_names
/*Prompts the user to enter the number of sweets and saves it to sweet_number*/
printf("Please enter the number of sweets:\n");
scanf("%d", &sweet_number);
// Now that you know the sweet_number, allocate as much memory as you need.
// And that can be more than 999 sweet names
sweet_names = (char **) malloc(sweet_number * sizeof(char *));
// i.e. make a character pointer to sweet_number character pointers.
// Again, some of your code here
for (i = 0; sweet_number > i; i++) {
printf("What is the name of the sweet?\n");
scanf("%s", reader); // read into the reader
sweet_names[i] = (char *) malloc(strlen(reader) + 1); // allocate as much memory as you need for the current string, the one just read into reader
strcpy(sweet_names[i], reader); // copy contents of reader to sweet_names[i]
}
// Again, your code to print the names
for (j = 0; sweet_number > j; j++){
printf("%s\n", sweet_names[j]);
free(sweet_names[j]); // free every string you allocated, it is good practice
}
// Finally, free the sweet_names pointers. Generally, when you allocate
// dynamically, which is what we do with malloc(), it is a good practice
// to free what you allocate becuase otherwise stays in memory and then
// memory leaks are created. There is a lot to say about C and memory
// but anyway, remember to free
free(sweet_names);
return 0;
}
最後,現在程序再次有限制只讀名最多,因爲reader
300個字符,但這個東西,你也可以處理,而這是爲讀者分配一個瘋狂的內存量,如1000000 個字符,然後釋放它。
你想要甜的名字的第一個字符或全名嗎? – Haris