View Compilation Error

0_0_23770456_9195.cpp:31:5: error: stray '\243' in program
     while (cin >> m>>n，m+n)
     ^
0_0_23770456_9195.cpp:31:5: error: stray '\254' in program
0_0_23770456_9195.cpp: In function 'int main()':
0_0_23770456_9195.cpp:31:25: error: expected ')' before 'm'
     while (cin >> m>>n，m+n)
                         ^
0_0_23770456_9195.cpp:31:28: error: expected ';' before ')' token
     while (cin >> m>>n，m+n)
                            ^
0_0_23770456_9195.cpp:51:1: error: expected '}' at end of input
 }
 ^