FILe

#include <stdio.h>
int main()
{

// r  read ; w = write ; a = append mode
    FILE *inputFile;
    inputFile = fopen("input.txt" , "r");

    if(inputFile == NULL){
        printf("File not found");
        return 0;
    }

    FILE *outputFile;
    outputFile = fopen("output.txt" , "w");

    while(1){
        char ch = fgetc(inputFile);
        if(ch == EOF){
            break;
        }

        fputc(ch , outputFile);
    }

    //Use log file for seeing history:
    FILE *logFile;
    logFile = fopen("output.txt" , "a");
    fprintf(logFile , "found at 9.05 pm\n");

    return 0;
}