题解 | #计算某字符出现次数#

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int main()
{
    char arr[1001];
    char ch;
    int count = 0;
    scanf("%[^\n]\n", &arr);
    scanf("%c", &ch);
    for(int i = 0; i < strlen(arr); i++)
    {
        if(isalpha(ch))
        {
            if(isalpha(arr[i]))
            {
                if(arr[i] == ch || arr[i] + 32 == ch || arr[i] - 32 == ch)
                {
                    count++;
                }
            } else {
                continue;
            }
        } else {
            if(arr[i] == ch)
            {
                count++;
            }
        }
    }
    printf("%d", count);
    return 0;
}