c++ - C语言传参如何直接传进一个新数组去？

Question

就像JAVA一样，

test(new String[] {"1", "2"});
static void test(String[] args) {
}

Answer 1

Although C cannot pass arrays as parameters, you can still create an "unnamed" array when passing parameters like this:

#include <stdio.h>

void print_string(char str[])
{
  puts(str);
}

int main()
{
  print_string((char []) {"anonymous"});
  return 0;
}

Answer 2

cLanguage can only pass a pointer, which is the first address of the array~

---

void a(int* array)；
void b(int array[])；

When a function is declared, int* array and int array[] are equivalent, and array can only be a pointer.
The first two are exactly the same and can also be written as:

void d(int const* array);

This is the same, the array is passed as a const pointer in c.

In the example below, you can see that arr points to the same address.

#include <stdio.h>
void arr_p(int* arr){
    printf("%d\t%d\n", arr, &arr[0]);
}
void arr_a(int arr[]){
    printf("%d\t%d\n", arr, &arr[0]);
}
void arr_10(int arr[10]){
    printf("%d\t%d\n", arr, &arr[0]);
}
int main(){
    int arr[20]={0};//20个元素
    arr_p(arr);
    arr_a(arr);
    arr_10(arr);//这里并不会检查数组是否超过10个元素
    printf("%d\t%d\n", arr, &arr[0]);
    getchar();
    return 0;
}

As for the example of @拉丝Master, I tried it in vs2010 and it showed a syntax error. Maybe, is there something I didn't do right?

---

Also, if you want to complain, there are no points for likes in comments. There is no need for the author to be stingy enough to even cancel this~ :D

Answer 3

int sum(int* arr){
    // Do something
    return 0;
    }
int a[5] = {1,3,2,4,5};
sum(a);

Answer 4

The argv (argument vector) used by C programs to receive parameters by default is a string array.
char *argv[] = {"str1", "str2"};

#include <stdio.h>
int main(int argc, char *argv[]) {
    fprintf(stderr,"argc: %d\n",argc);
    int i;
    for(i=0;i<argc;i++) {
        fprintf(stderr,"argv[%d]: %s\n",i,argv[i]);
    }
    return 0;
}
编译: gcc ab.c -o ab
运行: ./ab -c10 -n500 http://127.0.0.1/index.php
结果:
argc: 4
argv[0]: ./ab
argv[1]: -c10
argv[2]: -n500
argv[3]: http://127.0.0.1/index.php
argc是参数个数,*argv[]是参数数组,用来接收命令行参数.