My program don't add up ? Eg 0.5+0.2+0.2+0.1 not equal to 1

[DeathYu]

Problem Solved!!! Thanks for helping guys

[ne555]

if(total_User_pay==1)

You shouldn't compare equalities with double or float type data.
The binary representation it's not exact, you've got trunc error. Instead of 1 you get 0,99999.

Use an epsilon to compare, round your number or try to work with integers

[ne555]

Also
avoid using goto.
main must return int.
when posting code, please use code tags