help saving and displaying variable into one string.

Hello every one

I am doing a real time clock (just arduino and keypad),keypad to input the first current time. The total code is working I just have small problem, I have an int variable for hours and int variables for minutes both calculated every cycle (1min) separate so I wont to combine them and save them in one string as (hours:minutes)

I could post the code but it wont be that beneficial because code is long and what is needed was mentioned.

Ex:
Input current time : 10:45 ---------------- so in this hours = 10 and minutes = 45
delaying for 1 sec
output should be 10:46

I want to save it on string because the idea is to combine hours with minutes separated by ":"

I wish some one can help me, you could use this for implementing to me :

int hours;
int minutes;

sprintf?
dtostrf and strcat?

I solve it already

Would you like to share your solution?