View Compilation Error

0_0_33432174_12390.cpp: In function 'int main()':
0_0_33432174_12390.cpp:13:19: error: too few arguments to function 'int update(int, int)'
         update(a+b);
                   ^
0_0_33432174_12390.cpp:4:5: note: declared here
 int update(int a,int b)
     ^