创建文件中的文件I / O.

for(c='A'; c<='Z'; ++c)
{
     p = fopen("D:\DriveName.txt", "w+"); 
     fseek( fp, filepointer , SEEK_SET );
     fputs(buffer,fp); 
     fclose(fp); 
     ++filepointer;
}
for(c='A'; c<='Z'; ++c)
{
     p = fopen("D:\D