#include<stdio.h>
void jiafa(int,int)/*函数声明*/
void main()
{
int a,b,n
scanf("%d%d",&a,&b)
scanf("%d",&n)
switch(n)
{
case 1:
jiafa(a,b)/*这里可以写成调用函数,也可以像下面一样直接写*/
break
case2:printf("%d",a-b)break
case3:printf("%d",a*b)break
case3:printf("%d",a/b)break
}
}
void jiafa(int a,int b)/* 函数定义*/
{
printf("%d",a+b)
}
#include<stdio.h>void main()
{
int all=0,i,m
printf("请输入球队个数:")
scanf("%d",&m)
for(i=1i<mi++)
{
all+=i
}
printf("比赛总场数:%d\n",all)
}