Hello. We have this problem in class today. The code is as follows, without compilation and testing. # include & ltstdio，h & gtint main(){ int a[3][3]； //You can define the initial value as (int I = 0；; I<3; i++)for(int j = 0； j & lt3; j++){ a[I][j]= j； //assignment, I did it casually} intsum = 0; //Define variables to store diagonal sums (int b = 0；; b & gt3; b++){ sum = = sum+a[b][b]； } } }