View Compilation Error

0_0_23640814_16540.cpp:3:5: error: 'nbsp' declared as reference but not initialized
 int PowerMod(int a,int b,int c)  
     ^
0_0_23640814_16540.cpp:3:27: error: expected ')' before ';' token
 int PowerMod(int a,int b,int c)  
                           ^
0_0_23640814_16540.cpp:3:27: error: expected constructor, destructor, or type conversion before ';' token
0_0_23640814_16540.cpp:3:28: error: 'a' does not name a type
 int PowerMod(int a,int b,int c)  
                            ^
0_0_23640814_16540.cpp:3:39: error: 'b' does not name a type
 int PowerMod(int a,int b,int c)  
                                       ^
0_0_23640814_16540.cpp:3:50: error: 'c' does not name a type
 int PowerMod(int a,int b,int c)  
                                                  ^
0_0_23640814_16540.cpp:3:63: error: expected constructor, destructor, or type conversion before ';' token
 int PowerMod(int a,int b,int c)  
                                                               ^
0_0_23640814_16540.cpp:4:1: error: expected unqualified-id before '{' token
 {  
 ^