十六周实验报告1.0

来源：互联网发布：淘宝便宜的书店编辑：程序博客网时间：2024/05/21 22:36

* (程序头部注释开始)

* 程序的版权和版本声明部分

* 文件名称：读取500名工人工资

* 作者：任小宁

* 完成日期： 2012 年6 月 4日

* 版本号： 201158504431

* 对任务及求解方法的描述部分

#include<iostream>    #include<fstream>   using namespace std;    class Salary  {  public:      void ordered_salary_add();      void ordered_salary();      void input_salary();void ordered_salary_txt();private:             double salary[500];      int number;  };int main()  {      Salary s1; //cout<<"500人的原始工资为："<<endl;    s1.input_salary();      //cout<<endl;      cout<<"排序后工资为:";      cout<<endl;      s1.ordered_salary();      cout<<endl;  s1.ordered_salary_txt();system("PAUSE");      return 0;  }void Salary::input_salary()  {      int i=0;  ifstream infile("salary.txt",ios::in);if (!infile){cerr<<"open error!"<<endl;exit(1);}for (i=0;i<500;i++)infile>>salary[i];infile.close();//for(i=0;i<500;i++)//cout<<salary[i]<<"  ";//cout<<endl;    number=500;  }void Salary::ordered_salary_add()  {      int i;      for (i=0;i<number;i++)      {          salary[i]=salary[i]+100;          //cout<<salary[i]<<"  ";      }      return;  }  void Salary::ordered_salary()  {      int i,j;      double t;      for(i=0;i<number-1;i++) {        for(j=0;j<number-i-1;j++) {            if(salary[j]>salary[j+1])              {                  t=salary[j];                  salary[j]=salary[j+1];                  salary[j+1]=t;              }  }}for (i=0;i<number;i++)  {  cout<<salary[i]<<"  ";  }  return;  }  void Salary::ordered_salary_txt(){ofstream outfile("ordered_salary.txt",ios::out);if(!outfile){cerr<<"open error!"<<endl;exit(1);}for(int i=0;i<500;i++)outfile<<salary[i]<<"\n";outfile.close();return ;}

排序后工资为:
534.43 544.67 548.71 553.65 554.3 560.24 572.72 573.1 585.25 589.43 58
9.97 592.22 596.16 599.77 611.29 613.3 614.22 619.54 622.48 634.22 640
.75 643.84 648.86 666.83 678.67 680.8 681.29 688.48 694.8 695.48 699.6
8 705.92 710.45 723.49 728.13 729.15 741.9 746.5 748.5 757.65 763.77
771.3 773.56 778.31 779.92 782.3 791.95 792.32 802.77 804.2 817.2 825.
9 828.64 831.11 831.39 832.11 833.42 844.49 845.14 850.4 850.81 851.57
853.4 858.74 862.27 862.48 862.85 864.92 872.61 876.95 881.12 895.16
897.91 899.71 901.26 902.29 906.43 909.41 909.68 928.37 938.28 940.34
949.99 950.45 955.17 955.71 962.11 962.4 962.57 972.81 972.92 975.23
978.89 980.55 985.94 993.84 998.22 1003.34 1003.43 1005.34 1005.61 1005
.74 1006.2 1011.89 1013.89 1024.76 1026.28 1034.7 1045.9 1050.54 1061.6
6 1066.63 1068.69 1069.9 1072.8 1082.87 1091.62 1091.78 1099.51 1103.17
1112.86 1115.36 1115.57 1115.63 1118.11 1119.57 1132.66 1136.91 1143.6
4 1145.24 1145.34 1147.89 1163.87 1166.78 1168.84 1170.91 1180.6 1181.1
6 1187.33 1190.11 1194.68 1194.8 1194.94 1197.41 1199.42 1207.1 1213.95
1220.87 1222.8 1228 1228.94 1231.26 1231.82 1236.46 1239.96 1245.72 1
254.24 1254.64 1265.45 1267.37 1268.82 1280.23 1287.69 1290.2 1296.38 1
297.42 1298.99 1306.81 1309.49 1311.32 1313.75 1324.28 1326.54 1326.63
1327.6 1329.64 1332.45 1336.68 1346.39 1348.9 1349.45 1358.76 1360.18 1
385.12 1387.96 1399.35 1401.49 1404.53 1423.2 1432.14 1440.24 1446.58 1
449.49 1457.61 1459.25 1488.51 1489.57 1495.6 1496.64 1506.61 1515.47 1
522.4 1525.74 1529.11 1529.37 1558.9 1562.86 1564.16 1568.5 1576.12 157
8.49 1579.13 1591.71 1597.74 1599.24 1604.15 1605.55 1608.52 1608.76 16
13.66 1621.71 1628.1 1636.8 1638.25 1639.24 1641.16 1646.79 1646.94 164
8.4 1652.41 1658.92 1659.35 1663.38 1664.4 1675.24 1679.8 1680.9 1687.4
1 1688.42 1696.38 1707.64 1707.79 1711.96 1718.82 1729.38 1741.93 1748.
4 1755.86 1760.42 1760.89 1763.34 1765.32 1768.74 1782.77 1784.22 1792.
99 1795.2 1800.54 1810.6 1810.68 1821.47 1822.32 1826.21 1835.38 1842.5
4 1843.52 1848.4 1848.92 1854.94 1864.86 1869.9 1870.13 1872.97 1874.49
1885.23 1886.45 1886.9 1887.33 1892.87 1893.97 1895.55 1900.77 1900.84
1903.66 1904.57 1904.86 1906.4 1934.49 1938.33 1939.63 1942.62 1946.62
1946.68 1952.96 1955.57 1971.24 1974.22 1980.74 1984.87 1990.25 1990.5
9 2001.91 2009.47 2011.1 2019.3 2026.19 2027.8 2029.45 2037.31 2041.49
2047.84 2048.96 2052.36 2065.6 2071.62 2080.98 2084.51 2085.27 2092.66
2102.52 2102.63 2106.57 2112.3 2118.2 2121.39 2124.58 2138.85 2143.46
2144.4 2145.1 2145.54 2145.99 2149.21 2152.35 2152.61 2158.61 2161.6 21
62.98 2170.71 2178.65 2183.8 2187.4 2192.81 2194.15 2203.48 2206.63 221
1.9 2221.71 2226.63 2233.84 2240.99 2249.5 2252.79 2258.94 2265.7 2277.
5 2292.48 2292.62 2306 2308.74 2310.37 2325.6 2334.86 2340.57 2341.73
2344.9 2346.91 2349.14 2359.26 2359.4 2360.12 2369.1 2375.89 2376.48 23
83.71 2384.95 2386.22 2390.4 2391 2398.59 2400.2 2409.58 2410.92 2416.1
7 2424.46 2434.65 2434.72 2439.71 2441.1 2446.31 2450.49 2457.61 2478.7
4 2487.88 2491.6 2495.5 2497.9 2504.25 2507.35 2513.58 2520.23 2521.74
2530.81 2536.18 2538.14 2540.76 2544.43 2550.13 2551.5 2554.82 2560.7
2564.65 2580.97 2600.42 2607.83 2620.15 2620.87 2626.1 2627.47 2627.62
2629.71 2638.86 2640.22 2641.32 2648.55 2650.92 2656 2666.2 2669.59 267
3.31 2700.53 2702.7 2704.35 2705.8 2708.74 2709.33 2711.12 2714.84 2716
.12 2717.51 2735.2 2738.9 2739.34 2741.95 2743.18 2745.52 2767.94 2772.
59 2772.85 2773.98 2777.54 2787.2 2792.31 2798.32 2809.58 2809.59 2814.
89 2815.13 2816.2 2822.33 2827.11 2831.31 2832.47 2835.94 2836.74 2838.
8 2839.73 2841.68 2846.23 2851.86 2854.6 2857.6 2861.65 2874.9 2875.25
2879.14 2885.38 2886.68 2890.26 2904.98 2905.76 2906.75 2906.93 2909.22
2912.41 2914.69 2919.21 2930.51 2934.8 2940.78 2945.1 2947.46 2958.17
2958.93 2962.72 2968.97 2981.5 2982.7 2984.95 2985.84
请按任意键继续. . .

每一个打开的文件都有一个文件指针，该指针的初始位置有I/O方式指定。每次读写都从文件指针的当前位置开始。没读入一个字节，指针就后移一个字节。当文件指针移到最后，就会遇到文件结束EOF，此时流对象的成员函数EOF的值为非0值，表示文件结束。