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file1中:
#include<stdio.h>
int A;
void main()
{
int power(int );
int b=3,c,d,m;
printf("enter the number a and its power m:\n");
scanf("%d,%d",&A,&m);
c=A*b;
printf("%d*%d=%d\n",A,b,c);
d=power(m);
printf("%d**%d=%d\n",A,m,d);
}
file2中:
extern A;
int power(int n)
{
int i,y=1;
for(i=1;i<=n;i++)
y*=A;
return(y);
}
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