Compilare: main.cpp: In function 'bool comp1(coord, coord)': main.cpp:11:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return(a.x<b.x || a.x==b.x && a.y<b.y); ~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'bool comp2(coord, coord)': main.cpp:15:32: warning: suggest parentheses around '&&' within '||' [-Wparentheses] return(a.y<b.y || a.y==b.y && a.x<b.x); ~~~~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:19:11: warning: unused variable 'a' [-Wunused-variable] int n,a,b,i,k=0,max1=0,A,x1,y1,j,jsus,jstg,z,ok; ^ main.cpp:19:13: warning: unused variable 'b' [-Wunused-variable] int n,a,b,i,k=0,max1=0,A,x1,y1,j,jsus,jstg,z,ok; ^ main.cpp:19:17: warning: unused variable 'k' [-Wunused-variable] int n,a,b,i,k=0,max1=0,A,x1,y1,j,jsus,jstg,z,ok; ^ main.cpp:19:30: warning: unused variable 'x1' [-Wunused-variable] int n,a,b,i,k=0,max1=0,A,x1,y1,j,jsus,jstg,z,ok; ^~ main.cpp:19:33: warning: unused variable 'y1' [-Wunused-variable] int n,a,b,i,k=0,max1=0,A,x1,y1,j,jsus,jstg,z,ok; ^~