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#2
lan7975972020-04-23 21:41
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#include <stdio.h>
main()
{
int n;
printf("input number\n");
scanf("%d",&n);
s(100);
printf("n=%d\n",n);
}
int s(int n)
{
int i;
for(i=n-1;i>=1;i--)
n=n+i;
printf("n=%d\n",n);
}