View Compilation Error

0_0_22418211_17774.cpp: In function 'void delZero(char*)':
0_0_22418211_17774.cpp:18:22: error: ambiguating new declaration of 'void delZero(char*)'
 void delZero(char a[])
                      ^
0_0_22418211_17774.cpp:3:5: note: old declaration 'int delZero(char*)'
 int delZero(char a[]);
     ^
0_0_22418211_17774.cpp:22:9: error: 'i' was not declared in this scope
     for(i=0;i<len;i++){
         ^