View Compilation Error

0_0_32861280_25042.cpp: In function 'int main()':
0_0_32861280_25042.cpp:46:38: error: expected primary-expression before '<' token
         for(int i = 1; i <= n; i++) {<span> </span>//数据合法
                                      ^
0_0_32861280_25042.cpp:46:39: error: 'span' was not declared in this scope
         for(int i = 1; i <= n; i++) {<span> </span>//数据合法
                                       ^
0_0_32861280_25042.cpp:46:45: error: expected primary-expression before '<' token
         for(int i = 1; i <= n; i++) {<span> </span>//数据合法
                                             ^
0_0_32861280_25042.cpp:46:46: error: expected primary-expression before '/' token
         for(int i = 1; i <= n; i++) {<span> </span>//数据合法
                                              ^
0_0_32861280_25042.cpp:47:13: error: expected primary-expression before 'double'
             double x,y;
             ^
0_0_32861280_25042.cpp:48:29: error: 'x' was not declared in this scope
             scanf("%lf%lf",&x,&y);
                             ^
0_0_32861280_25042.cpp:48:32: error: 'y' was not declared in this scope
             scanf("%lf%lf",&x,&y);
                                ^