View Compilation Error

0_0_19899924_13522.cpp: In function 'bool f()':
0_0_19899924_13522.cpp:46:8: error: 's' was not declared in this scope
   a[0]=s[0][0], a[1]=s[4][0], a[2]=s[2][2], a[3]=s[5][0];  
        ^
0_0_19899924_13522.cpp:82:8: error: 's' was not declared in this scope
   a[0]=s[1][0], a[1]=s[4][1], a[2]=s[3][2], a[3]=s[5][0];  
        ^
0_0_19899924_13522.cpp:119:8: error: 's' was not declared in this scope
   a[0]=s[0][0], a[1]=s[1][0], a[2]=s[2][0], a[3]=s[3][0];  
        ^