passing argument 1 of ‘pthread_create’ makes pointer from integer without a cast [-Wint-conversion]
时间: 2024-03-04 07:52:00 浏览: 22
这个错误通常是因为在调用pthread_create函数时,传递给它的第一个参数是一个整数而不是指针类型。pthread_create函数的第一个参数应该是一个指向线程标识符的指针,而不是一个整数。
你可以检查一下pthread_create函数的调用,确保第一个参数是一个指向正确类型的指针。如果你需要传递一个整数值给线程函数,你可以将它封装在一个结构中,然后将指向该结构的指针传递给pthread_create函数。
另外,你可以在编译时加上-Wno-int-conversion选项来禁止这个警告,但这不是一个好的解决方法,因为它会隐藏潜在的错误。
相关问题
passing argument 1 of 'search' makes pointer from integer without a cast [-Wint-conversion]
This warning message typically occurs when you are passing an integer value to a function that expects a pointer as its argument. The compiler is warning you that there is a mismatch between the type of the argument you are passing and the type the function expects.
To fix this warning, you should ensure that you are passing the correct type of argument to the function. If the function expects a pointer, you should pass a pointer variable or address. If you are passing an integer value, you may need to cast it to a pointer type before passing it to the function.
For example, consider the following code:
```
int search(int *array, int size, int key) {
// implementation of search function
}
int main() {
int arr[] = {1, 2, 3, 4, 5};
int key = 3;
int index = search(key, arr, 5);
// rest of the code
}
```
Here, we are passing the arguments to the `search` function in the wrong order. The function expects an array pointer as its first argument, but we are passing an integer value (`key`) instead. To fix this, we should swap the order of the arguments:
```
int main() {
int arr[] = {1, 2, 3, 4, 5};
int key = 3;
int index = search(arr, 5, key);
// rest of the code
}
```
If you are still getting the warning message after correcting the argument types, you may need to check the function declaration to ensure that it matches the expected argument types.
passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
这个错误通常是因为在使用 `printf` 函数时,传递了一个整数而不是指针类型的参数。 `printf` 函数需要传递与格式化字符串中占位符对应的参数类型,例如 `%d` 对应整数类型,`%f` 对应浮点类型等等。如果传递了错误的参数类型,就会出现这个错误。
例如,以下代码会出现这个错误:
```
int age = 25;
printf("My age is %s", age);
```
正确的做法应该是将 `%s` 改成 `%d`,将整数类型的 `age` 传递给 `printf` 函数:
```
int age = 25;
printf("My age is %d", age);
```