在二维数组中存储消息的函数（在C编程中）

Question

What I want to achieve is a C program that stores names every time the user enters a name like the following:

func1: read: john

func2 print john

func1: read: michael

func2 print: john print: michael

I want to know how to do this in 2 functions and not a single function.

• I have 2 function.
• function 1 -reads messages inputed by the user.(max number of 5 messages)

.

void read(void)
{
    int i;

    char read[100];
    // char * msg = (char *) malloc(sizeof(msg));

    //i want to read 5 messages from user
    for (i=0;i<5;i++)
    {
        scanf("%s",&read); 
        //i want to copy the message read into a variable msg, 
        //i dont know why i am doing this
        //strcpy(msg,read);
        //i want to call the store funcion 
        store(read);
    }
}

• function 2
  • it is called in function1's loop to read 5 mesaages
  • takes messages and passes it to its parameter
  • it stores message in a 2d array
  • prints entire 2d array

.

int store(char *stock)
{
    printf("saving.....stored\n");
    char share[5][10]; //this is my 2d array to hold 5 
                       //messages/names of 10 chars long
    int i=0;

    char * savedmsg = (char *) malloc(sizeof(savedmsg));
    strcpy(share[i],stock); 

    printf("%s\n",share[i]);
    i++; 
    printf("%s\n", share[1]);
}

I have started learning C this week but I presume the error I am getting is that func2 keeps re-initializing i=0; where I want it to increment i++; so func2 keeps overwriting the first index in 2d array.

Thanks for future help.

Answer 1

Instead of using

int i=0;

declare it as static like this:

static int i=0;

The value of i is saved during function call.