# include <stdio.h>
# include <stdlib.h>

int main ()
{
    int n,i,a;
    printf("Enter number of days in month:");
    scanf("%d",&n);
    printf("Enter starting day of the week (1=Sun,7=Sat):");
    scanf("%d",&a);
    if (a==2)
    printf("    ");
    if (a==3)
    printf("        ");
    if (a==4)
    printf("            ");
    if (a==5)
    printf("                ");
    if (a==6)
    printf("                    ");
    if (a==7)
    printf("                        ");
   
    for ( i = 1 ; i<= n ; i++ ) {
        if (i==(8-a)||i==(8-a+7)||i==(8-a+14)||i==(8-a+21)||i==(8-a+28))
        printf("%3d\n",i);
        else
        printf("%3d ",i);
    }
    system("pause");
    return 0;
}


用户指定这个月的天数和该月起始日是星期几

以上程序正确，我想请教一下有没更简便的做法

谢谢