Write a program to append one file”1.txt” at the end of another “2.txt”.

答案:2 悬赏:0

解决时间 2021-02-26 23:14

提问者网友：野性
2021-02-26 14:05

用c编

最佳答案

二级知识专家网友：丢不掉的轻狂
2021-02-26 14:24

#include
#include
#include

using namespace std;

int openFiles (string inFile1, string inFile2, string outFile1);
void mergeFiles (string inFile1, string inFile2, string outFile1,ifstream& File1,ifstream& File2,ofstream& outFile);

int main()
{
string inFile1, inFile2, outFile1;
ifstream File1;
ifstream File2;
ofstream outFile;

cout <<"Enter input file 1:"< cin >>inFile1;
cout <<"Enter input file 2:"< cin >>inFile2;
cout <<"Enter output file 1:"< cin >>outFile1;

openFiles (inFile1, inFile2, outFile1);
mergeFiles (inFile1, inFile2, outFile1, File1, File2, outFile);

return 0;

}

void mergeFiles (string inFile1, string inFile2, string outFile1,ifstream& File1,ifstream& File2,ofstream& outFile)
{
File1.open(inFile1.c_str());
File2.open(inFile2.c_str());
outFile.open(outFile1.c_str());

string File1_fName, File1_lName,exam1,examGrade1;
string File2_fName, File2_lName,exam2,examGrade2;

File1 >> File1_fName >> File1_lName>>exam1>>examGrade1;
File2 >> File2_fName >> File2_lName>>exam2>>examGrade2;

while (!File1.eof() && !File2.eof())
{

if ((File1_fName<=File2_fName ))
{
outFile << File1_fName << '\t'<< File1_lName << endl;
File1 >> File1_fName >> File1_lName>>exam1>>examGrade1;

}
else
{
outFile << File2_fName << '\t'<< File2_lName << endl;
File2 >> File2_fName >> File2_lName>>exam2>>examGrade2;
}
if (File1.eof() )
{
while (!File2.eof())
{
outFile << File2_fName << '\t'<< File2_lName << endl;
}
}

if (File2.eof() )
{
while (!File1.eof())
{
outFile << File1_fName << '\t'<< File1_lName << endl;
}
}

File1.close();
File2.close();
outFile.close();
}

}

int openFiles (string inFile1, string inFile2, string outFile1)
{
ofstream outFile;
outFile.open (outFile1.c_str());

if (outFile.fail())
{
cerr << "ERROR: cannot open " < << " for output." < return EXIT_FAILURE;
}

ifstream File1;
File1.open (inFile1.c_str());

if (File1.fail())
{
cerr << "ERROR: cannot open " < << " for input." < return EXIT_FAILURE;

}

ifstream File2;
File2.open (inFile2.c_str());

if (File2.fail())
{
cerr << "ERROR: cannot open " < << " for input." < return EXIT_FAILURE;
}
}

全部回答

1楼网友：duile
2021-02-26 15:45

是不是资源被删了？

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