View Compilation Error

0_0_25592591_26706.cpp:8:17: error: macro parameters must be comma-separated
 #define rep(int i, a, b) for(int i = a; i < b; ++i)
                 ^
0_0_25592591_26706.cpp: In function 'int main()':
0_0_25592591_26706.cpp:13:6: error: 'i' was not declared in this scope
  rep(i,0,p) rep(j,0,p) {
      ^
0_0_25592591_26706.cpp:13:11: error: 'rep' was not declared in this scope
  rep(i,0,p) rep(j,0,p) {
           ^