PATB1021个数统计

参考代码：

#include<cstdio>
#include<cstring>
#include<cstdlib>

int main()
{
    char str[1010];
    int i = 0;
    fgets(str, 1010, stdin);
    while (str[i] != '\n')
        i++;
    str[i] = '\0';
    int len = strlen(str);

    int count[10] = { 0 };
    for (int i = 0; i < len; i++)
    {
        count[str[i] - '0']++;
    }

    for (int i = 0; i < 10; i++)
    {
        if (count[i] != 0)
        {
            printf("%d:%d\n", i, count[i]);
        }
    }
    system("pause");
    return 0;
}