View Compilation Error

0_0_20250109_31906.cpp: In function 'int main()':
0_0_20250109_31906.cpp:61:45: error: 'strcmp' was not declared in this scope
     while(scanf("%s", str)&&strcmp(str,"END")!=0){  
                                             ^
0_0_20250109_31906.cpp:63:25: error: 'strlen' was not declared in this scope
         len = strlen(str);  
                         ^