View Compilation Error

0_0_23431021_12725.cpp: In function 'int main()':
0_0_23431021_12725.cpp:10:30: error: 'i' was not declared in this scope
     for(int t = 1; t <= cas; i++){
                              ^
0_0_23431021_12725.cpp:12:31: error: 'memset' was not declared in this scope
         memset(up,0,sizeof(up));
                               ^
0_0_23431021_12725.cpp:30:35: error: 'd' was not declared in this scope
         printf("Case #%d: %d\n",t,d[n][num]);
                                   ^
0_0_23431021_12725.cpp:30:40: error: 'num' was not declared in this scope
         printf("Case #%d: %d\n",t,d[n][num]);
                                        ^