#include <stdio.h>
#include <stdlib.h>
int main()
{
// declare a struct
struct
{
int aa, bb;
}f1, f2, f3={212, 610}; // variable name (with content)
printf("aa1, bb1: ");
scanf("%d %d", &f1.aa, &f1.bb);
printf("aa2, bb2: ");
scanf("%d %d", &f2.aa, &f2.bb);
printf("area1=%d\n", f1.aa * f1.bb);
printf("area2=%d\n", f2.aa * f2.bb);
printf("area3=%d\n", f3.aa * f3.bb);
printf("----------------------\n");
// edit the content of f1 and f2
f1.aa=1;
f1.bb=10;
f2.aa=12;
f2.bb=5;
printf("area1=%d\n", f1.aa * f1.bb);
printf("area2=%d\n", f2.aa * f2.bb);
printf("area2=%d\n", f3.aa + f3.bb);
system("pause");
return 0;
}