Computer Programming C Laboratory: File Operations C Programs

C Program to print the message "Ran out of data" and terminates further reading

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C Programs using File Operations - using Error Handling

C Program to print the message "Ran out of data" and terminates further reading.

/* C Program to prints the message "Ran out of data" and terminates further reading */

#include <stdio.h>

#include <conio.h>

void main()

{

/* Local definitions */

char *filename;

FILE *fp1, *fp2;

int i,number;

/* Statements */

clrscr();

fpl = fopen("TEST", "W"); /* file open function creates a new file for read/write operation */

for(i= 10;i<=100;i+=10)

putw(i,fpl);

fclose(fp1); /* file close function closes a filé associated with file pointer*/

printf("\nInput filename \n");

open_file:

scanf("%s", filename);

if((fp2 = fopen(filename, "r")) == NULL)

{

printf("Cannot open the file. \n");

printf("Type filename again. \n\n");

goto open file;

} /* if */

else

for(i=1;i<= 20;i++)

{

number = getw (fp2);

if (feof(fp2))

{

printf("\nRan out of data. \n");

break; /* break statement comes out of loop */

} /* if */

else

printf("%d\n", number);

} /* for */

fclose(fp2); /* file close */

} /* main */

OUTPUT

Input filename

TESTS

Cannot open the file.

Type filename again.

TEST

100

Ran out of data.

EXPLANATION: In this program fpl and fp2 are file pointers. The file TEST is opened and assigned to fpl. Then writes the data 10 to 100 using for loop and close the file pointer. The if statement checks the entered file name is correct or not if the entered file name is NULL then prints "cannot open the file", otherwise another if prints the result as "Ran out of data", while the if statement not satisfied then else block is executed and prints the data from the file as shown as output.

Computer Programming C Laboratory: File Operations C Programs : Tag: C Programming : - C Program to print the message "Ran out of data" and terminates further reading

<< Previous

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Computer Programming C Laboratory: File Operations C Programs

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