nudt-compiler-cpp/test/test_case/basic/nested_if.sy

int main() {
    int a = 5;
    int b = 10;
    int c = 15;
    int result = 0;
    
    if (a < b) {
        if (b < c) {
            result = 100;
        } else {
            result = 200;
        }
    } else {
        result = 300;
    }
    
    return result;
}