View Compilation Error

0_0_18542903_31503.cpp: In function 'int main()':
0_0_18542903_31503.cpp:7:1: error: 'a' was not declared in this scope
 a=s[0];b=s[1];c=s[2];
 ^
0_0_18542903_31503.cpp:7:8: error: 'b' was not declared in this scope
 a=s[0];b=s[1];c=s[2];
        ^
0_0_18542903_31503.cpp:7:15: error: 'c' was not declared in this scope
 a=s[0];b=s[1];c=s[2];
               ^