Error >> TESTE500K.c:(.text+0x8f): Undefined Reference to `INSERT' <<

Question

Guys, I’m trying to create a list but it’s making these mistakes
TESTE500K.c:(.text+0x8f): Undefined Reference to `INSERT'

TESTE500K.c:(.text+0xa5): Undefined Reference to `IMPRIME'

[Error] Ld returned 1 Exit status

Would have to do with String (char*) that is another problem, but I decided to test first with char only that is not working.

    #include <stdlib.h>
    #include <stdio.h>

    struct agenda {
        int tel;
        char nome;
        struct agenda *prox;
    };
    typedef struct agenda Agenda;
    typedef Agenda *Ponteiro;

    void INSERE (Ponteiro *, int , char);
    void IMPRIME (Ponteiro);


    int main (){
        Ponteiro inicio = NULL;
        int telefone;
        char NOME;
        int escolha;
        printf ("DIGITE: \n 1 para Inserir \n 2 para Imprimir \n 3 para Finalizar \n");
        scanf ("%d", &escolha);
        if (escolha == 1){
            printf ("DIGITE O NOME: \n");
            scanf ("%c", &NOME);
            printf ("DIGITE O NUMERO: \n");
            scanf ("%d", &telefone);
            INSERE (&inicio, telefone, NOME);

        }
        else if (escolha == 2){
            IMPRIME (inicio);
        }
        else {
            return 0;
        }
        void INSERE (Ponteiro *sPtr, int novo_telefone, char novo_nome){
            Ponteiro novo, anterior, atual;
            novo = malloc (sizeof(Agenda));
            if (novo != NULL){
                novo->tel = novo_telefone;
                novo->nome = novo_nome;
                anterior = NULL;
                atual = *sPtr; 
                while (atual != NULL){
                    anterior = atual;
                    atual = atual ->prox;
                    if (anterior == NULL) {
                        novo->prox = *sPtr;
                        *sPtr = novo;
                    }
                    else{
                        anterior->prox = novo;
                        novo->prox = atual;
                    }
                }
            }
        }
        void IMPRIME(Ponteiro atual) {
            if (atual == NULL)
                printf( "A Agenda esta vazia.\n\n" ) ;

            else {
                printf( "A lista eh:\n");
                while (atual != NULL) {
                    printf("%c", atual->nome);
                    printf("%d", atual->tel);

                    atual = atual -> prox;
                }
            }
    }
    }

Answer 1

After

 else {
        return 0;
    }

there should be one more key, which would close the function main(). Without the key, you’re basically setting the functions IMPRIME() and INSERE() inside main(), which is impossible in C, so the functions are not being created, and your compiler doesn’t know what to do.

You also need to remove the last key from the program, as that is where your program is currently ending.