View Compilation Error

0_0_35610129_6653.c
0_0_35610129_6653.c(9) : error C2059: 语法错误:“if”
0_0_35610129_6653.c(21) : error C2065: “sum”: 未声明的标识符
0_0_35610129_6653.c(23) : error C2065: “sum”: 未声明的标识符
0_0_35610129_6653.c(25) : error C2059: 语法错误:“)”
0_0_35610129_6653.c(26) : error C2059: 语法错误:“return”
0_0_35610129_6653.c(27) : error C2059: 语法错误:“}”