In c++ How would you sort an array by comparing a position in the array.

{city: Houston, age: 19, name:joe}

{city: Dallas, age: 18, name:Andrew}

{city: Austin, age: 20, name:bob}

Let's say you have to sort this array by city. How would you get the position the city's name starts at (position 7 from the beginning) and compare each

example:

the H in houston {city: [H]ouston....}

the D in dallas {city: [D]allas....}

the A in Austin {city: [A]ustin....}

so comparing H, D, A so the array sorted looks like this

{city: Austin, age: 20, name:bob}

{city: Dallas, age: 18, name:Andrew}

{city: Houston, age: 19, name:joe}