View Compilation Error

0_0_13559604_10407.cpp:2:23: error: 'i' was not declared in this scope
     char find(char *c[i][1000])
                       ^
0_0_13559604_10407.cpp: In function 'char find(...)':
0_0_13559604_10407.cpp:5:16: error: 'n' was not declared in this scope
     for(j=1;j<=n;j++)
                ^
0_0_13559604_10407.cpp:7:10: error: 'f' was not declared in this scope
      if(!f[i])
          ^
0_0_13559604_10407.cpp:7:12: error: 'i' was not declared in this scope
      if(!f[i])
            ^
0_0_13559604_10407.cpp:9:5: error: expected primary-expression before '}' token
     }
     ^
0_0_13559604_10407.cpp: In function 'int main()':
0_0_13559604_10407.cpp:18:22: error: 'memset' was not declared in this scope
  memset(f,0,sizeof(f)); 
                      ^