C PROGRAM In some programs we would like to be able to determine the input and output file names at the time that the program is executed. Modify your eventsfunc.c program from assignment 5 so that the main program prompts the user for the two file names and passes the input file name to the readvalues function. The function readvalues now opens the input file to read the data and closes it when done. The main should open the specified output file to write out the results of the run. The program should interact with the user as follows: Enter the input filename : events.txt Enter the output filename: events.out
Answered Essay: C PROGRAM In some programs we would like to be able to determine the input and output file names at the time that the program
Expert Answer
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Events.txt
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hi hello,
welcome to the new Codingworld!
this is koothada venkanna
from the cashlink global systems
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Events.out
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welcome
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Source Program.
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#include<stdio.h>
#include <stdlib.h>
void readvalues(char *);
int main()
{
FILE *fp;
char input_file_name[50],output_file[50],data[100];
printf(“—————————–n”);
printf(“****File demonstartion****n”);
printf(“Enter the input file name:”);
scanf(“%s”,input_file_name);
readvalues(input_file_name);
printf(“Enter the name output file :n”);
scanf(” %s”,output_file);
if((fp=fopen(output_file, “w”))==NULL)
{
printf(“Error!”);
exit(1);
}
printf(“Read Data to file:n”);
scanf(“%s”,data);
fprintf(fp,”%s”, data);
fclose(fp);
}
void readvalues(char file_name[])
{
FILE *fp;
char str[100];
if ((fp= fopen(file_name, “r”)) == NULL)
{
printf(“unable to open input file”);
exit(1);
}
while(!feof(fp))
{
fgets(str,79,fp);
printf(“%s”,str);
}
fclose(fp);
printf(“The input filename closes:n”);
printf(“—————————–n”);
}
