程序代码：

#include "stdio.h"
#include "stdlib.h"
#include "ctype.h"
#include "string.h"
#define falsse 0
#define true 1
#define capacity 50
#define INCR 2
int main(void)
{
    char *yanyu = NULL;
    char *temp = NULL;
    int count = 0;
    int num = 0;
    int flag = false;
    char answer = 'n';
    do
    {
        if (count == num)
        {
            num += INCR;
            temp = (char*)malloc(capacity*sizeof(char));
            if (yanyu != NULL)
            {
                for (int i = 0; i < count; i++)
                    *(temp + i) = *(yanyu + i);
                free(yanyu);
            }
            yanyu = temp;
            free(temp);
            temp = NULL;
        }
        printf("请输入几句谚语：\n");
        scanf_s("%s", capacity, yanyu + count++);       //此句

        printf("还想输入更多吗（'y' or 'n'）\n");
        scanf_s("  %c", &answer);
    } while (tolower(answer) == 'y');