View Compilation Error

0_0_20837783_20107.cpp:6:1: error: expected initializer before 'int'
 int h[30];
 ^
0_0_20837783_20107.cpp: In function 'int main()':
0_0_20837783_20107.cpp:10:16: error: 'c' was not declared in this scope
     scanf("%s",c);
                ^
0_0_20837783_20107.cpp:12:26: error: 'i' was not declared in this scope
     while(scanf("%s",key[i]!=EOF){
                          ^
0_0_20837783_20107.cpp:12:34: error: expected ')' before '{' token
     while(scanf("%s",key[i]!=EOF){
                                  ^
0_0_20837783_20107.cpp:17:32: error: expected ')' before ';' token
     for(int j=0;j<strlen(key[i];j++){
                                ^
0_0_20837783_20107.cpp:31:34: error: expected ')' before ';' token
       for(int j=0;j<strlen(key[i];j++){
                                  ^