我的大学 C++ 代码有问题。我似乎无法理解为什么我的 sRecSort()
方法不起作用。
有什么帮助吗?这让我很困惑!
#include <iostream>
#include <algorithm>
#include <string>
#include <fstream>
#include <sstream>
using namespace std;
void sRecSort(string n[], int s[], string e[], int len){
for (int i = 0; i < len; i++){
for (int j = 1; j < len; j++){
if (s[j] < s[i]){
string tempName = " ";
string tempName2 = " ";
int tempGrade,tempGrade2;
string tempEmail = " ";
string tempEmail2 = " ";
tempName = n[i];
tempName2 = n[j];
tempGrade = s[i];
tempGrade2 = s[j];
tempEmail = e[i];
tempEmail2 = e[j];
s[i] = tempGrade2;
s[j] = tempGrade;
n[i] = tempName2;
n[j] = tempName;
e[i] = tempEmail2;
e[j] = tempEmail;
}
}
}
}
void printLowestRecord(char inFileName[]){
string tempSubString = " ";
string names[12] = {" "};
int grades[12] = {0};
string emails[12] = {""};
int firstSpace = -1;
int secondSpace = -1;
ifstream inputMe(inFileName);
while (!inputMe.eof()){
for (int i = 0; i < 12; i++){
getline(inputMe, tempSubString);
for (int w = 0; w < strlen(tempSubString.c_str()); w++){
if (tempSubString[w] != ' '){
continue;
}
else{
if (firstSpace == -1){
firstSpace = w;
}
else if (firstSpace != -1 && secondSpace == -1){
secondSpace = w;
names[i] = tempSubString.substr(0, firstSpace);
grades[i] = atoi((tempSubString.substr(firstSpace + 1, secondSpace - (firstSpace + 1))).c_str());
emails[i] = tempSubString.substr(secondSpace + 1, tempSubString.length() - (secondSpace + 1));
break;
}
}
}
firstSpace = -1;
secondSpace = -1;
}
}
sRecSort(names,grades,emails,12);
cout << names[0] << " " << grades[0] << " " << emails[0] << endl;
inputMe.close();
}
void sortFileRecords(char inFileName[], char outFileName[]){
ifstream inputFile(inFileName);
ofstream outputFile(outFileName);
string tempSubString = " ";
string names[12] = {" "};
int grades[12] = {0};
string emails[12] = {" "};
int firstSpace = -1;
int secondSpace = -1;
while (!inputFile.eof()){
for (int i = 0; i < 12; i++){
getline(inputFile, tempSubString);
for (int w = 0; w < strlen(tempSubString.c_str()); w++){
if (tempSubString[w] != ' '){
continue;
}
else{
if (firstSpace == -1){
firstSpace = w;
}
else if (firstSpace != -1 && secondSpace == -1){
secondSpace = w;
names[i] = tempSubString.substr(0, firstSpace);
grades[i] = atoi((tempSubString.substr(firstSpace + 1, secondSpace - (firstSpace + 1))).c_str());
emails[i] = tempSubString.substr(secondSpace + 1, tempSubString.length() - (secondSpace + 1));
break;
}
}
}
firstSpace = -1;
secondSpace = -1;
}
}
int tempSmallest = grades[0];
int idxCatch = 0;
for (int x = 1; x < 12; x++){
if (grades[x] < tempSmallest){
tempSmallest = grades[x];
idxCatch = x;
}
}
for (int e = 0; e < 12; e++){
cout << names[e] << " " << grades[e] << " " << emails[e] << endl;
}
//string tmpStringForInt = " ";
//stringstream tmpSS;
/*for (int q = 0; q < 12; q++){
tmpSS << grades[q];
tmpStringForInt = tmpSS.str();
outputFile << names[q] << " " << tmpStringForInt << " " << emails[q] << endl;
}*/
inputFile.close();
outputFile.close();
}
int main (int argc, char * const argv[]) {
printLowestRecord("gradebook.txt");
sortFileRecords("gradebook.txt", "sortedGradebook.txt");
return 0;
}
最佳答案
您的算法失败了,Pavel 为您指明了正确的方向,而 Sam 为您提供了一个不错的选择。
然而,您真正的问题是您没有以系统的方式处理问题,没有在解决更大、更简单的问题之前解决更小、更简单的问题。您应该首先编写了一个简单的排序算法来对单个数组进行排序,并编写了一个单元测试程序来执行代码。接下来,您应该已经转移到您拥有的多个数组(或者更准确地说,结构)和一个证明事情仍然有效的单元测试。以这种方式继续,直到您构建了一个可以正常工作并且可以满足您所有需求的系统。
欢迎来到软件开发流程。
关于c++ - 为什么我的排序方法不起作用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/1583509/