View Compilation Error

0_0_15399578_32277.cpp: In function 'int main()':
0_0_15399578_32277.cpp:7:8: error: 'SUM' cannot be used as a function
   SUM(n)=0;
        ^
0_0_15399578_32277.cpp:10:9: error: 'SUM' cannot be used as a function
    SUM(n)=SUM(n)+i;
         ^
0_0_15399578_32277.cpp:10:16: error: 'SUM' cannot be used as a function
    SUM(n)=SUM(n)+i;
                ^
0_0_15399578_32277.cpp:12:24: error: 'SUM' cannot be used as a function
    printf ("%d\n",SUM(n));
                        ^