File Handling (console to file) in C Program

File Handling (console to file) in C Program

How to write a C Program Writing a character into a file,reading the character from the console and writing the next letter into the file in C Programming Language ?



Solution:
/* Writing a character into a file,reading the character from the console and writing the next letter into the file*/

#include<stdio.h>
#include<stdlib.h>

int main()
{

FILE *fp; //creates a file pointer
char ch;
int con;


fp=fopen("filehandling.txt","w+"); // creates a text file with label "filehandling" in write mode

if(fp==NULL)  //checks for the filename validity
{
printf("\nUnable to open the file\n");
exit(0);
}
printf("\nFile opened successfully\n");

printf("\nEnter the character as input\n");
scanf("%c",&ch);


putc(ch,fp);

fclose(fp);

fp=fopen("filehandling.txt","rwa+");

ch=getc(fp);


con=ch;
con++;
if(con>=97 && con<122)
{

fprintf(fp,"\nthe next char is %c\n",con);
}
else
{
fprintf(fp,"\nthe next char is a\n");
fclose(fp);

// open filehandling.txt file and check the input and output given...
}
}


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