View Compilation Error

0_0_32339650_6706.cpp: In function 'int main()':
0_0_32339650_6706.cpp:12:21: error: 'strcmp' was not declared in this scope
   if(strcmp(str1,"#")==0)
                     ^
0_0_32339650_6706.cpp:17:28: error: 'strlen' was not declared in this scope
   for(int i=0;i<strlen(str1);++i)
                            ^