Main.cc: In function ‘int main()’: Main.cc:24:3: error: expected primary-expression before ‘int’ int k=1; ^~~ Main.cc:25:15: error: ‘k’ was not declared in this scope while((w1-a[k].w)>=0&&k<=s){ ^ Main.cc:30:11: error: ‘k’ was not declared in this scope if(w1