Index of programs:Set 3

Uses techniques of FILES

Write data to a file

Read data from a file

Copy one file to another file

Convert contents of a file to uppercase without function

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Program1:
#include<fstream.h> // fstream contains defintion of IOSTREAM operations #include<stdio.h> #include<conio.h> /* Author : Rohith.R Email : rrohithr@gmail.com Category : Begineer Program : To write to a certain file Meant For : Plus Two students,Kerala */ void main() { clrscr(); char file[15]; cout<<"\n Enter file name"; cin>>file; ofstream writeto(file); char text[500]; cout<<"\n Enter text"; gets(text); for(int i=0;text[i]!='\0';i++) writeto<<text[i]; // Instead of a writeto.put << is overloaded cout<<"\n Press any key to continue"; getch(); }

Program 2:

#include<fstream.h> #include<string.h> #include<conio.h> #include<stdio.h> /* Author : Rohith.R Email : rrohithr@gmail.com Category : Begineer Program : To display contents of a file Meant For : Plus Two students,Kerala */ void main() { int i=0; char file[15]; char te; char text[500]; clrscr(); cout<<"\n Enter filename:"; cin>>file; ifstream readfrom(file); if(!readfrom) cout<<"\n Error opening file"; else { while(readfrom) { readfrom.get(te); text[i]=te; i++; } text[i]='\0'; cout<<text; } cout<<"\n Press any key to continue"; getch(); }

Program 3:

#include<fstream.h> #include<string.h> #include<process.h> // for exit function #include<conio.h> #include<stdio.h> /* Author : Rohith.R Email : rrohithr@gmail.com Category : Begineer Program : To copy one file to another file Meant For : Plus Two students,Kerala */ void main() { char source[15]; char destiny[15]; char te; cout<<"\n Enter source file name"; cin>>source; ifstream readfrom(source); if(!readfrom) { cout<<"\n Error opening file"; exit(0); } else { cout<<"\n Enter destination file"; // Warning any present file will be rewritten cin>>destiny; ofstream writeto(destiny); while(readfrom) { readfrom.get(te); writeto.put(te); } } cout<<"\n Copying completed successfully"; cout<<"\n Press any key to continue"; getch(); }

Program 4:

#include<fstream.h> #include<conio.h> #include<stdio.h> /* Author : Rohith.R Email : rrohithr@gmail.com Category : Begineer Program : To convert lower to upper case without using function and using files too Meant For : Plus Two students,Kerala */ void main() { char source[15]; char ch; clrscr(); cout<<"\n Enter source file name"; gets(source); ifstream readfrom(source); if(!readfrom) { cout<<"\n Cannot read from file"; return; } else { cout<<"\n The content of file in Uppercase is\n"; while(readfrom) { readfrom.get(ch); if(ch<=122 &&ch>=97) ch=ch-32; cout<<ch; } getch(); }}

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