习题6.7

#include<stdio.h>

main()
{
int a,b,i;
a=100;
float sum,term;
sum=0;
scanf(“%d”,&b);
for(i=1;i++;)
{
term=100+sum;
sum=term*b/100;
if(sum==100)
printf(“%d\n”,i-1);
}
}