示例

int main(int argc, char* argv[])
{
int a = 7;
double b = 22;

double result = b/a;

return result;
}

解决方案
将某个变量显式强制转换为匹配的类型。

int main(int argc, char* argv[])
{
int a = 7;
double b = 22;

double result = b / static_cast<double>(a);

return 
result;
}