c++ - Reading from a file with multiple columns of integers and putting them into arrays -

i creating command-line minesweeper game has save , continue capability. code generates file called "save.txt" stores position of mines , cells player has opened. separated 2 columns delimited space left column represents row of cell , right column represents column of cell in matrix generated code. following contents of save.txt after sample run:

3 7 3 9 5 7 6 7 8 4 mine end 2 9 1 10 3 5 1 1 cell open end 

you may have noticed mine end , cell open end. these 2 separate numbers 2 groups first 1 position of mines , latter position of cells opened player. have created code generates array each column provided text file contains integers:

int arrayrow[9]; int arraycol[9]; ifstream infile("save.txt"); int a, b; while(infile >> >> b){     for(int = 0; < 9; i++){         arrayrow[i] = a;         arraycol[i] = b;     } } 

as can see, won't quite work text file since contains non-integer text. basically, want create 4 arrays: minerow, minecol, openedrow, , openedcol per described first paragraph.

aside parsing string , doing string operations, can redefine file format have header. can parse once , keep in numbers. namely:

let header first 2 rows

row 1 = minerowlen minecollen   row 2 = openedrowlen openedcollen   row 3...n = data  save.txt:  40 30   20 10   // rest of entries 

then read 40 minerow, 30 minecol, 20 openedrow, 10 openedcol since know lengths. potentially harder debug, allow hide save state better disallow easy modification of it.