[C++知识库]PTA1021-C语言

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

int char_int(char* a, int point)
{
    return (int)(*(a+point) - '0');
}

void Print_Array(int a[],int len)
{
    int i ;
    for(i = 0; i < len; i ++)
    {
        printf("%d ",a[i]);
    }
}

int main()
{
    char c_num[1001];
    scanf("%s",c_num);
    int i_num[1001];
    int i;
    for(i = 0; i < strlen(c_num); i ++)
    {
        i_num[i] = char_int(c_num,i);
    }
    int flag[10] = {0};
    for(i = 0; i < strlen(c_num); i ++)
    {
        switch (i_num[i])
        {
            case 0:flag[0]++;break;
            case 1:flag[1]++;break;
            case 2:flag[2]++;break;
            case 3:flag[3]++;break;
            case 4:flag[4]++;break;
            case 5:flag[5]++;break;
            case 6:flag[6]++;break;
            case 7:flag[7]++;break;
            case 8:flag[8]++;break;
            case 9:flag[9]++;break;
            default:
                break;
        }
    }
    int cout  = 0;
    for(i = 0 ;i < 10;i ++)
    {
        if(flag[i] != 0)
        {
            cout ++; 
        }
    }

    for(i = 0 ;i < 10;i ++)
    {
        if(flag[i] != 0)
        {
            printf("%d:%d",i,flag[i]);
            if(cout != 0)
                printf("\n");
            cout --;
        }
    }
   
    return 0;
}