View Compilation Error

0_0_38171505_13666.cpp: In function 'int main()':
0_0_38171505_13666.cpp:28:51: error: 'strcmp' was not declared in this scope
                     if(!strcmp(ballon[i],ballon[j]))//与以前的颜色进行对比...出现则加1
                                                   ^
0_0_38171505_13666.cpp:37:13: error: 'i' was not declared in this scope
         for(i=0;i<N;i++)
             ^