Resposta :
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main() {
srand(time(NULL));
int vetor[20], menor, indice;
for (int u=0;u<10;u++){
vetor[u]=rand()%100+1;
printf("[%d]:: %d\n",u,vetor[u]);
}
menor = vetor[19];
for (int a=0;a<10;a++){
if (menor>vetor[a]) {menor=vetor[a]; indice=a;}
}
printf("\nMenor:\n");
printf(">>[%d]:: %d\n",indice,menor);
return 0;
}