View Compilation Error

0_0_17741667_23700.cpp: In function 'int main(int, const char**)':
0_0_17741667_23700.cpp:4:5: error: 'int32_t' was not declared in this scope
     int32_t a=0;
     ^
0_0_17741667_23700.cpp:5:13: error: expected ';' before 'b'
     int32_t b=0;
             ^
0_0_17741667_23700.cpp:6:13: error: expected ';' before 'sum'
     int32_t sum=0;
             ^
0_0_17741667_23700.cpp:7:20: error: 'a' was not declared in this scope
     scanf("%d %d",&a,&b);
                    ^
0_0_17741667_23700.cpp:7:23: error: 'b' was not declared in this scope
     scanf("%d %d",&a,&b);
                       ^
0_0_17741667_23700.cpp:8:5: error: 'sum' was not declared in this scope
     sum = a+b;
     ^