C :

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
main()
{
	int year;
	double rate,capital,deposit;                 /*利率，本金，利息*/
	scanf("%d,%lf",&year,&capital);
	switch(year)
	{
		case 1:rate = 0.0225;
		       break;
		case 2:rate = 0.0243;
		       break;
		case 3:rate = 0.0270;
			   break;
		case 4:rate = 0.0288;
			   break;
		case 5:rate = 0.0300;
			   break;
	}
	deposit = capital * pow(1+rate,year);
	printf("合计为%f",deposit);
	return 0;
}

C++ :

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
main()
{
	int year;
	double rate,capital,deposit;                 /*利率，本金，利息*/
	scanf("%d,%lf",&year,&capital);
	switch(year)
	{
		case 1:rate = 0.0225;
		       break;
		case 2:rate = 0.0243;
		       break;
		case 3:rate = 0.0270;
			   break;
		case 4:rate = 0.0288;
			   break;
		case 5:rate = 0.0300;
			   break;
	}
	deposit = capital * pow(1+rate,year);
	printf("合计为%f",deposit);
	return 0;
}