View Compilation Error

0_0_19324204_30318.cpp:28:17: error: stray '\243' in program
                 set[y] = 0；//标记在右边出现过
                 ^
0_0_19324204_30318.cpp:28:17: error: stray '\273' in program
0_0_19324204_30318.cpp: In function 'int search(char*)':
0_0_19324204_30318.cpp:6:33: error: 'strcmp' was not declared in this scope
          if( !strcmp( str,ch[i] ) )
                                 ^
0_0_19324204_30318.cpp:8:23: error: 'strcpy' was not declared in this scope
     strcpy( ch[c],str );
                       ^
0_0_19324204_30318.cpp:9:27: error: 'strlen' was not declared in this scope
     int len = strlen( str );
                           ^
0_0_19324204_30318.cpp: In function 'int main()':
0_0_19324204_30318.cpp:15:27: error: 'scanf' was not declared in this scope
     while( scanf( "%d",&n ),n )
                           ^
0_0_19324204_30318.cpp:29:17: error: expected ';' before 'if'
                 if( set[x] == 2 )//防止在左边出现的已经在右边出现了
                 ^
0_0_19324204_30318.cpp:38:34: error: 'puts' was not declared in this scope
             puts( f ? "Yes":"No" );
                                  ^