View Compilation Error

0_0_33307876_6825.cpp: In function 'int main()':
0_0_33307876_6825.cpp:67:19: error: 'strcpy' was not declared in this scope
         strcpy(d,a);strcpy(e,b);
                   ^
0_0_33307876_6825.cpp:69:22: error: 'strlen' was not declared in this scope
         len1=strlen(a);
                      ^