C Exercises: Copy a file in another name
C File Handling : Exercise-11 with Solution
Write a program in C to copy a file in another name.
Assume that the content of the file test.txt is : test line 1 test line 2 test line 3 test line 4
Sample Solution:
C Code:
#include <stdio.h>
#include <stdlib.h>
void main()
{
FILE *fptr1, *fptr2;
char ch, fname1[20], fname2[20];
printf("\n\n Copy a file in another name :\n");
printf("----------------------------------\n");
printf(" Input the source file name : ");
scanf("%s",fname1);
fptr1=fopen(fname1, "r");
if(fptr1==NULL)
{
printf(" File does not found or error in opening.!!");
exit(1);
}
printf(" Input the new file name : ");
scanf("%s",fname2);
fptr2=fopen(fname2, "w");
if(fptr2==NULL)
{
printf(" File does not found or error in opening.!!");
fclose(fptr1);
exit(2);
}
while(1)
{
ch=fgetc(fptr1);
if(ch==EOF)
{
break;
}
else
{
fputc(ch, fptr2);
}
}
printf(" The file %s copied successfully in the file %s. \n\n",fname1,fname2);
fclose(fptr1);
fclose(fptr2);
getchar();
}
Sample Output:
Copy a file in another name : ---------------------------------- Input the source file name : test.txt Input the new file name : test1.txt The file test.txt copied successfully in the file test1.txt.
Flowchart:
C Programming Code Editor:
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Previous: Write a program in C to append multiple lines at the end of a text file.
Next: Write a program in C to merge two files and write it in a new file.
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C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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