View Compilation Error

0_0_13546994_23906.cpp: In function 'int hui(int)':
0_0_13546994_23906.cpp:36:5: error: redefinition of 'int hui(int)'
 int hui(int a)
     ^
0_0_13546994_23906.cpp:9:5: note: 'int hui(int)' previously defined here
 int hui(int x){          //判断回文
     ^
0_0_13546994_23906.cpp: In function 'int su(int)':
0_0_13546994_23906.cpp:52:5: error: redefinition of 'int su(int)'
 int su(int a)
     ^
0_0_13546994_23906.cpp:2:5: note: 'int su(int)' previously defined here
 int su(int x){           //判断素数
     ^
0_0_13546994_23906.cpp: In function 'int main()':
0_0_13546994_23906.cpp:64:5: error: redefinition of 'int main()'
 int main()
     ^
0_0_13546994_23906.cpp:21:5: note: 'int main()' previously defined here
 int main(void){
     ^