#include<stdio.h>
#include<stdlib.h>
 
typedef struct{
 char nome[30];
 int idade;
 int altura;
}Pessoa;
 
int main(void){
    int escolha=1,linhas=1,i=0;
    Pessoa *p = NULL;
 
 
    for(;;){
            puts("(0) para sair do programa (1) para inserir novo nome \n");
            scanf("%d",&escolha);
            getchar();
            switch(escolha){
            case 1:
                p = (Pessoa *) realloc(p,sizeof(Pessoa*)*linhas);
                 if(!p){
                    puts("nao foi possivel alocar memoria");
                    exit(-1);
                }
 
                puts("insira o nome da pessoa");
                scanf("%s", p[linhas].nome);
                getchar();
                puts("insira a idade da pessoa");
                scanf("%d", &p[linhas].idade);
                getchar();
                puts("insira a altura da pessoa");
                scanf("%d", &p[linhas].altura);
                getchar();
                linhas++;
                break;
            case 0:
 
                for(i=1;i<linhas;i++)
                    printf("Pessoa %d nome: %s\tidade: %d\taltura: %d \n", i,p[i].nome,p[i].idade,p[i].altura);
                free(p);
                exit(1);
            default:
                puts("Caractere invalido inserido!");
            }
    }
    return 0;
}

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1
Fulano
10
1.10
1
Ciclano
5
0.5
0