Use of fprintf function in C file handling

The printf() function is used for formatted output on the standard output device. In a similar manner the fprintf() function is used for formatted output to files.

Syntax of fprintf() - fprintf(< file pointer >, "< format specifier >", < variable list >)

Program to create a data file using fprintf() function

#include < stdio.h >

void main()

{

FILE *ptr;

int a_no, i,records;

float balance;

char name[30];

clrscr();

printf("Program to create a data file to store information of a bank accounts using fprintf() \n\n");

ptr=fopen("dd.txt","a");

if(ptr == NULL) /* File opened in append mode */

{

printf("Cannot open the file for writing records ... terminating \n\n");

getch();

return;

}

printf("How many records do you want to add :");

scanf("%d", &records);

fflush(stdin);

for(i =0; i < records; i++) /* loop to enter data for number of records */

{

printf("Enter the account number :");

scanf("%d", &a_no);

fflush(stdin);

printf("\n Enter the name of the account holder :");

gets(name);

fflush(stdin);

printf("\n Enter the current balance :");

scanf("%f", &balance);

fflush(stdin);

/* Writing the record in the data file */

fprintf(ptr, "%4d, %30s, %f \n", a_no, name,balance);

} /* End of loop to input number of records */

fclose(ptr);

printf("Writing of records finished \n\n");

getch();

}