how to search string from a text file also after searching searching it should change

[rajnish singh]

I have to search x,y cordinates from a text file.Ater searchig x,y value from the file ,the value of x,y should change in other format in output mode.

Suppose we have x=33.5,y=77.5

in output mode the value of x should be .335xxxxxxxD+02
and y should be .775xxxxxxxxD+0 2.

I will appriciate if anyone can help me.

[JavierL]

Save the value in a array of chars, then add it to a string with the modification you want.