View Compilation Error

0_0_16523772_16192.c: In function 'main':
0_0_16523772_16192.c:4:9: error: expected '=', ',', ';', 'asm' or '__attribute__' before '.' token
  int s,a.b,i;
         ^
0_0_16523772_16192.c:6:6: error: 'i' undeclared (first use in this function)
  for(i=0;i<s;i++)
      ^
0_0_16523772_16192.c:6:6: note: each undeclared identifier is reported only once for each function it appears in
0_0_16523772_16192.c:8:18: error: 'a' undeclared (first use in this function)
   scanf("%d %d",&a,&b);
                  ^
0_0_16523772_16192.c:8:21: error: 'b' undeclared (first use in this function)
   scanf("%d %d",&a,&b);
                     ^