View Compilation Error

0_0_34118285_13526.cpp: In function 'int main()':
0_0_34118285_13526.cpp:8:54: error: 'strcmp' was not declared in this scope
     while(scanf("%s",start),strcmp(start,"ENDOFINPUT"))
                                                      ^
0_0_34118285_13526.cpp:20:20: error: invalid conversion from 'const char*' to 'char' [-fpermissive]
                s[i]="A";
                    ^