Math BS about to graduate?

I am about to graduate with a bachelors in math. I have taken pretty standard cles: calc, discrete, linear/abstract algebra, real ysis. I still have one year and plan on taking some applied cles like linear/nonlinear programming and optimization. I have an okay gpa of 3.75 in math, and a couple courses in c++, which i enjoyed. My question is: what should I do next?