View Compilation Error

0_0_33126409_9354.cpp: In function 'void merge_sort(s*, int)':
0_0_33126409_9354.cpp:32:38: error: 'strcpy' was not declared in this scope
      strcpy(stu[k].name,stu_l[i].name);
                                      ^
0_0_33126409_9354.cpp:39:38: error: 'strcpy' was not declared in this scope
      strcpy(stu[k].name,stu_r[j].name);
                                      ^
0_0_33126409_9354.cpp:47:37: error: 'strcpy' was not declared in this scope
     strcpy(stu[k].name,stu_l[i].name);
                                     ^
0_0_33126409_9354.cpp: In function 'int main()':
0_0_33126409_9354.cpp:90:40: error: 'strcmp' was not declared in this scope
     if(strcmp(stu1[i].name,stu2[i].name)!=0)
                                        ^