#include<stdio.h> main() { int time=30; int sum=3000000; double p=0.03; double money; money=sum/(1+p*time); printf("投入的本金:%lf ",money); }
![](https://images2015.cnblogs.com/blog/809060/201603/809060-20160312153306929-995175952.png)
#include<stdio.h> main() { int time=30; int sum=3000000; double p=0.03; double money; money=sum/(1+p*time); printf("投入的本金:%lf ",money); }