View Compilation Error

0_0_15511964_8029.cpp:19:14: error: 'q' was not declared in this scope
 int sum=rand(q, 10000000);
              ^
0_0_15511964_8029.cpp:20:1: error: expected unqualified-id before 'for'
 for(int i=1; i<=n; i++) {
 ^
0_0_15511964_8029.cpp:20:14: error: 'i' does not name a type
 for(int i=1; i<=n; i++) {
              ^
0_0_15511964_8029.cpp:20:20: error: 'i' does not name a type
 for(int i=1; i<=n; i++) {
                    ^
0_0_15511964_8029.cpp:24:1: error: 'a' does not name a type
 a[rand(1, n)]+=sum;
 ^
0_0_15511964_8029.cpp: In function 'int main()':
0_0_15511964_8029.cpp:38:17: error: 'num' was not declared in this scope
                 num[1]=1;
                 ^
0_0_15511964_8029.cpp:47:17: error: 'M' was not declared in this scope
                 M=pos;
                 ^
0_0_15511964_8029.cpp:48:33: error: 'quickpow' was not declared in this scope
                 ans=quickpow(a,b);
                                 ^