作業1.C++檔案流的應用
如果令A,B,C,D,……,X,Y,Z這26個英文字母,分别等于百分之1,2,……,24,25,26個數值,那麼我們就能得出如下有趣的結論:
HARD WORD 8+1+18+4+23+15+18+11=98%
KNOWLEDGE 96%
LOVE 54% LUCK 47%
計算一下MONEY STUDY ATTITUDE
//
// main.cpp
// 2013-7-18作業1
// Created by 丁小未 on 13-7-18.
// Copyright (c) 2013年 dingxiaowei. All rights reserved.
//如果令A,B,C,D,……,X,Y,Z這26個英文字母,分别等于百分之1,2,……,24,25,26個數值,那麼我們就能得出如下有趣的結論:
//HARD WORD 8+1+18+4+23+15+18+11=98%
//KNOWLEDGE 96%
//LOVE 54% LUCK 47%
//計算一下MONEY STUDY ATTITUDE
#include <iostream>
#include <fstream>
using namespace std;
//輸入一個字母,然後傳回他對應的值
void getValue(char num[26],int n[26])
{
int j;
char c[2];
ifstream infile1,infile2;//定義檔案輸出類
infile1.open("file1.txt");
infile2.open("file2.txt");
for (int i=0; i<26; i++) {
infile1>>num[i];
infile2>>n[i];
}
infile1.close();
infile2.close();
}
int serch(char c)
int j; //記錄下标
char num[26];
int n[26];
getValue(num, n);
int i;
for (i=0; i<26; i++) {
if (c == num[i]) {
j=i;
break;
}
if(26 == i)
{
return 0;
return n[j];
// infile1.close();
// infile2.close();
int overridestrlen(const char *p)
int i=0;
do {
p++;
i++;
} while (*p!='\0');
return i;
int main(int argc, const char * argv[])
char num[26] = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
int val[26];
val[i] = i+1;
//将資料存儲到檔案中
ofstream onfile1,onfile2;//定義輸出檔案類(将資料寫入到檔案中)
onfile1.open("file1.txt");//打開一個輸入檔案file1用來儲存26個大寫的英文字母
onfile2.open("file2.txt");//打開一個輸入檔案file2用來儲存1-26個數字
onfile1<<num[i]<<' ';
onfile2<<val[i]<<' ';
onfile1.close();
onfile2.close();
char f1[10];
char f='Y';
int sum=0;
char s[50];
string ss;
cout<<"請輸入要計算的字元串"<<endl;
//cin>>s;
cin.getline(s, 80);
char *p=s;
int j = overridestrlen(p);
for (int i=0; i<j; i++){
sum+=serch(s[i]);
cout<<s<<":"<<sum<<"%"<<endl;
cout<<"您還要繼續計算嗎?(Y/N)";
//cin>>f>>f;
cin.getline(f1,10);
}while('Y' == f1[0]);
cout<<"歡迎使用!謝謝!"<<endl;
return 0;
結果:
請輸入要計算的字元串
LOVE
LOVE:54%
作業2.對string類進行重寫(重要,面試常考)
class String1
char *m_data;
public:
String1(const char *str = NULL) //普通構造函數
if (str==NULL) {
m_data = new char[1];
m_data[0] = '\0';
else
{
if (m_data) {
delete []m_data;
}
else
{
m_data = new char[strlen(str)];
strcpy(m_data, str);
String1(const String1&other) //拷貝構造函數
if (this == &other) {
cout<<"不能複制本身!"<<endl;
else if (this->m_data == other.m_data)
cout<<"不能複制相同的值"<<endl;
if (this->m_data) {
this->m_data = new char[strlen(other.m_data)+1];
strcpy(this->m_data, other.m_data);
~String1()//析構函數
if (this->m_data) {
delete []m_data;
String1 &operator = (const String1&other) //指派函數(通過重載=運算符)
if (this == &other)
return *this;
this->m_data = new char(strlen(other.m_data)+1);
//this->m_data = other.m_data;
//顯示函數
char *show()
return this->m_data;
};
String1 s1("dingxiaowei");
String1 s2;
s2 = s1;
char *p = s2.show();
cout<<p<<'\n'<<endl;
本文轉自蓬萊仙羽51CTO部落格,原文連結:http://blog.51cto.com/dingxiaowei/1366451,如需轉載請自行聯系原作者