View Compilation Error

0_0_29178304_8541.cpp: In function 'Matrix Mul(Matrix, Matrix)':
0_0_29178304_8541.cpp:34:27: error: unable to find numeric literal operator 'operator""fds'
             res.m[i][j] = 0fds;
                           ^
0_0_29178304_8541.cpp:34:27: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes