View Compilation Error

0_0_18766987_2444.cpp: In function 'double simpson(double, double)':
0_0_18766987_2444.cpp:54:8: error: redefinition of 'double simpson(double, double)'
 double simpson(double a,double b){  
        ^
0_0_18766987_2444.cpp:47:8: note: 'double simpson(double, double)' previously defined here
 double simpson(double a,double b){  
        ^
0_0_18766987_2444.cpp: In function 'int main()':
0_0_18766987_2444.cpp:75:48: error: 'asr' was not declared in this scope
     double v = 2*asr(0, x0, eps, simpson(0, x0));
                                                ^