View Compilation Error

0_0_11654403_6354.cpp: In function `double Gauss()':
0_0_11654403_6354.cpp:21: error: expected primary-expression before '%' token
0_0_11654403_6354.cpp:21: error: expected `;' at end of input
0_0_11654403_6354.cpp:21: error: expected `}' at end of input
0_0_11654403_6354.cpp:21: error: expected `}' at end of input