程序代码：

#include<stdio.h>
void main ()
{
FILE  *infile, *outfile;
int x, on, off;
char credit[30], name[30];

printf("\nMy SID is 059353128");
infile=fopen("tobill.txt", "r");
outfile=fopen("record.txt", "w");
for (x=1; x<28; x++)
{
   fscanf(infile, "%[^:]:%[^:]:%d:%d", credit, name, &on, &off);
   getc(infile);
   
}
fprintf(outfile, "Record %d is : %s %s %d %d\n", x, credit, name, on, off);
fclose(infile);
fclose(outfile);
}