学习笔记

#include
main()
{
        int a,b,c;
        printf("please input year and yue\n");
        scanf("%d%d",&a,&b);
        if((a%400)==0||(a%4)==0)
        {
        switch(b)
        {
                case 1:printf("31 days\n");break;
                case 2:printf("29 days\n");break;
                case 3:printf("31 days\n");break;
                case 4:printf("30 days\n");break;
                case 5:printf("31 days\n");break;
                case 6:printf("30 days\n");break;
                case 7:printf("31 days\n");break;
                case 8:printf("31 days\n");break;
                case 9:printf("30 days\n");break;
                case 10:printf("31 days\n");break;
                case 11:printf("30 days\n");break;
                case 12:printf("31 days\n");break;
        }
        }
        else
        {
        switch(b)
        {
                case 1:printf("31 days\n");break;
                case 2:printf("28 days\n");break;
                case 3:printf("31 days\n");break;
                case 4:printf("30 days\n");break;
                case 5:printf("31 days\n");break;
                case 6:printf("30 days\n");break;
                case 7:printf("31 days\n");break;
                case 8:printf("31 days\n");break;
                case 9:printf("30 days\n");break;
                case 10:printf("31 days\n");break;
                case 11:printf("30 days\n");break;
                case 12:printf("31 days\n");break;
        }
        }
}

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#include
main()
{
float xiaoshou,nashui;
printf("please input xiao shou e.....\n");
scanf("%f",&xiaoshou);
if(xiaoshou<10)
{
nashui=0.1;
printf("na shui%f\n",nashui);
}
else if(xiaoshou>10&&xiaoshou<=100)
{
nashui=xiaoshou*0.05;

printf("na shui%f\n",nashui);
}
else if (xiaoshou>100&&xiaoshou<500)
{
nashui=xiaoshou*0.05-10;
printf("na shui%f\n",nashui);

}
else if(xiaoshou>=500&&xiaoshou<=1000)
{
nashui=xiaoshou*0.05-30;
printf("na shui%f\n",nashui);
}
else
{
nashui=xiaoshou*0.05-50;
printf("na shui%f\n",nashui);
}
}