Создать текстовый файл следующего содержания

#include <fstream>
int main()
{
ofstream f("Имя_файла.txt");
f<<"Formal methods are a particular kind of mathematically based technique for the specification,
development and verification of software and hardware systems. The use of formal methods for software
and hardware design is motivated by the expectation that, as in other engineering disciplines, performing
appropriate mathematical analysis can contribute to the reliability and robustness of a design. They form
an important theoretical underpinning for software engineering, especially where safety or security is
involved. Formal methods are a useful adjunct to software testing since they help avoid errors and can also
give a framework for testing. For industrial use, tool support is required.";
f.close();
return 0;
}

#include <windows.h>
int main()
{
HANDLE hFile=CreateFile("filename.txt", GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); 
LPSTR File="Text";
DWORD dwWritten;
WriteFile(hFile, File, 702, &dwWritten, NULL);
CloseHandle(hFile);
return 0;
}

#include <stdio.h>
#include <conio.h>
int main()
{
FILE * fo; 
fo = fopen("filename.txt","wt"); 
fprintf( fo, "Сюда текст" ); 
fclose(fo);
return 0;
}