ok, I will try thanks for qoute :)

so here it is, I really dont know how to program here the problem : I have a file .txt format, in which there are many number sequentially down. for example : +1 +2 +3 +4 +5 etc... eg: my data have 100 number down, I have to divide them into 10 parts. later the file become 10 file .txt format, in which there are number 1 - 10 (part one), 11 - 20 (part two), 21 - 30, etc ... and the program must be made from C++. Thanks for help