C++ 文件读写示例
浏览数：25 /
时间：2015年06月08日
输入文件被看作输入流
输出文件被看作输出流
进行文件操作需包含头文件fstream
//this program repeatedly reads an income from
//the file incom.in until end-of file.
//Income under 6000 greenbacks is taxed at 30 percent,
//and income greater than or equal to 6000
//greenbacks is taxed at 60 percent.
//After reading each income, the program prints the
//income and tax.
#include<fstream>
using namespace std;
const int cutoff=6000;
const float rate1=0.3;
const float rate2=0.6;
int main(){
ifstream infile;
ofstream outfile;
int income, tax;
infile.open("income.in");
outfile.open("tax.out");
while(infile>>income){
if(income < cutoff)
tax = rate1 * income;
else
tax = rate2 * income;
outfile<<"tax= "<<tax<<endl;
}
infile.close();
outfile.close();
return 0;
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