#include <stdio.h>
#include <stdlib.h>
 
int main() {
    char string[100];
    char tabela[256];
 
    // Limpa a tabela.
    for (int i = 0; i < 256; i++) {
        tabela[i] = 0;
    }
 
    // Lê a frase do usuário.
    printf ("\nEscreva um texto: \n");
    fgets(string, 100, stdin);
    int tamanho = strlen(string);
 
    // Monta a tabela de frequências.
    for (int i = 0; i < tamanho; i++) {
        tabela[string[i]]++;
    }
 
    // Busca o índice de maior ocorrência na tabela.
    int maior = 0;
    char letra = '\0';
    for (int i = 0; i < 256; i++) {
        int t = tabela[i];
        if (t > maior) {
            maior = t;
            letra = (char) i;
        }
    }
 
    // Mostra o resultado.
    printf("\nO caractere '%c' aparece %d vezes.\n", letra, maior);
 
    // Fim.
    return 0;
}

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

b1JhdG9Sb2V1QVJvdXBhRG9SZWlEZVJvbWFFQVJhaW5oYVJvZXVPUmVzdG8u

oRatoRoeuARoupaDoReiDeRomaEARainhaRoeuOResto.