How to return a string in the C language?

In C language, strings can be represented using character arrays. Therefore, strings can be returned by returning a character array.

The specific steps are as follows:

1. Declare a character array and allocate enough memory space to store the string.
2. Copy the string into a character array.
3. Set the return type as a pointer to a character array in the function declaration.
4. come back

Here is a sample code showing how to return a string in the C programming language.

#include <stdio.h>
#include <string.h>

char* getString() {
    char str[100];  // 声明一个字符数组来存储字符串
    strcpy(str, "Hello, World!");  // 将字符串复制到字符数组中
    return str;  // 返回字符数组指针
}

int main() {
    char* result = getString();  // 调用函数并获取返回的字符串
    printf("%s\n", result);  // 输出返回的字符串
    return 0;
}

It is important to note that the character array declared inside the function is destroyed after the function ends, so it is not possible to access the memory space pointed to by the pointer after returning the character array pointer. If you need to use the returned string outside the function, you should allocate memory space on the heap and copy the string to that memory space.