unsigned GCD(unsigned a,unsigned b)
{
return b?GCD(b,a%b):a;
}

unsigned gcd(int nterm, ...)
{
unsigned gcd=0;
int i;
va_list p;
va_start(p,nterm);
for(i=1;i<=nterm;i++)
{
gcd=GCD(va_arg(p,unsigned),gcd);
}
va_end(p);
return gcd;
}

main( )
{
printf("%d\n",gcd(2,15,36));

printf("%d\n",gcd(4,480,216,360,1296));
}

//若干个自然数的最小公倍数
//形参1释义:指明“若干”是几

#include<stdio.h>
#include<stdarg.h>

static unsigned GCD(unsigned a,unsigned b)
{
return b?GCD(b,a%b):a;
}

static unsigned LCM(unsigned a,unsigned b)
{
return a/GCD(a,b)*b;
}

unsigned lcm(int nterm, ...)
{
unsigned lcm=1;
int i;
va_list p;
va_start(p,nterm);
for(i=1;i<=nterm;i++)
{
lcm=LCM(va_arg(p,unsigned),lcm);
}
va_end(p);
return lcm;
}

main( )
{
printf("%d\n",lcm(2,15,36));

printf("%d\n",lcm(4,480,216,360,1296));
}

#include<stdio.h>
#include<stdarg.h>

unsigned short GCD(unsigned short a,unsigned short b)
{
return b?GCD(b,a%b):a;
}

unsigned short gcd(int nterm, ...)
{
unsigned short gcd=0;
int i;
va_list p;
va_start(p,nterm);
for(i=1;i<=nterm;i++)
{
gcd=GCD(va_arg(p,unsigned short),gcd);
}
va_end(p);
return gcd;
}

main( )
{
printf("%d\n",gcd(2,15L,36)); //output 3

printf("%d\n",gcd(4,480,216L,360,1296L)); //output 24
}

#include<stdio.h>
double sumi(int,int);
double sumf(double,double);
main( )
{
printf("%lf\n",sumi(3.2,2));/*此处被警告,输出5.000000*/
printf("%lf\n",sumf(3.2,2));/*此处无警告,输出5.200000*/
}
double sumi(int i1,int i2)
{
return i1+i2;
}
double sumf(double x,double y)
{
return x+y;
}
//评论
//sumi(3.2,2)被警告是因为编译器预见到精度损失
//sumf(3.2,2)未受警告因为编译器预计精度无损失
//但从编程规范化考虑，两者都有欠缺。最好改为
//sumi((int)3.2,2)//意在表明：程序员有意为之
//sumf(3.2,(double)2)//理由同上
//类似轻微违法与犯罪分子的区别

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