View Compilation Error

0_0_24629593_15281.cpp:4:1: error: stray '\' in program
 using namespace std;\r
 ^
0_0_24629593_15281.cpp:5:1: error: stray '\' in program
 int main() \r
 ^
0_0_24629593_15281.cpp:6:1: error: stray '\' in program
 { \r
 ^
0_0_24629593_15281.cpp:7:5: error: stray '\' in program
     int a,b;\r
     ^
0_0_24629593_15281.cpp:8:5: error: stray '\' in program
     while(cin>>a>>b)\r
     ^
0_0_24629593_15281.cpp:9:9: error: stray '\' in program
         cout<<a+b<<endl;\r
         ^
0_0_24629593_15281.cpp:10:5: error: stray '\' in program
     return 0;\r
     ^
0_0_24629593_15281.cpp:4:22: error: 'r' does not name a type
 using namespace std;\r
                      ^