c语言格式化输出大比拼

int main()
{   
    int64_t test = 100;
    printf("%lld\n",test);
    float f_test = 100.2123;
    printf("%f\n",f_test);

    scanf("%f",&f_test);
    printf("%f\n",f_test);


}

    double shoes = 10.23;
    printf("%-10.2f ok\n",shoes);
    printf("%-15.2f ok\n",shoes);
    printf("%10.2f ok\n",shoes);
    printf("%15.2f ok\n",shoes);
    printf("%.2f ok\n",shoes);
    printf("%.6f ok\n",shoes);
    printf("%.2ef ok\n",shoes);

    int index = 0 ;
    while(++index < 5)
    {
        printf("%5d \n",index);
    }
    return 0;