How do I write a file in c with names of several variables?

Question

Good morning. I have a problem to be able to create a file that stores the time when the user modified a particular program, for example: If the user ran the file at 2h34min32s, I want to save this date in a file with this format"cliente_2_34_32.txt". the cogido is below:

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

struct cliente{
 char nome[30];
 int cpf,cep;
};
void info(struct cliente *aux){
 int cpf,cep;
 printf("\n digite os dados:\n Nome:");
 gets(aux->nome);
 printf("\n CPF: ");
 scanf("%d",&cpf);
 fflush(stdin);
 printf("\n CEP: ");
 scanf("%d",&cep);
 fflush(stdin);
 aux->cpf=cpf;
 aux->cep=cep;
};
int main()
{
 time_t tempo;
 struct tm *tempoS;
 int n=0;
 struct cliente *vet,*aux;
 FILE *ptr;
 vet=(struct cliente*)malloc((n+1)*sizeof(struct 
 cliente));
 info(vet);
 int v,y=1;
 while(y){
    printf("\n Deseja continuar: 1- sim, outro numero- 
  nao");
    scanf("%d",&v);
    fflush(stdin);
    if(v==1){
        n++;
        vet=(struct cliente*)realloc(vet,(n+1)*sizeof(struct cliente));
        aux=&vet[n];
        info(aux);
    }else{
        y=0;
    }
}
free(vet);
tempo=time(NULL);
tempoS=localtime(&tempo);
char nome[]="vaca_%d.txt";

printf("cliente_%d_%d_%d",tempoS->tm_hour,tempoS->tm_min,tempoS->tm_sec);
ptr=fopen(nome,"w");
fclose(ptr);

return 0;
}

The answer screen is this:

I wanted to know how to make the printf phrase (cliente_17_14_43) be the name of the txt file.

Answer 1

you can rename the file use the function name

PROTOTYPE:

int rename (const char *Caminho_com_nome_antigo, const char *Caminho_com_nome_novo);