View Compilation Error

0_0_15001314_8727.cpp: In function 'int main()':
0_0_15001314_8727.cpp:19:25: error: 'strcpy' was not declared in this scope
    strcpy(text[i], piece);
                         ^
0_0_15001314_8727.cpp:22:27: error: 'strlen' was not declared in this scope
   columns = strlen(text[0]);
                           ^