/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
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*******************************************************************************/

#include <stdio.h>
#include <string.h>
#include <ctype.h>

int ocurrencias(char frase[100], int largo, char letra) {
    int cant = 0;
    char ucLetra = toupper(letra);
    for (int i = 0; i < largo; i++)
        if (toupper(frase[i]) == ucLetra)
            cant++;
    return cant;
}

int main() {
    char frase[100] = "Hoy hay clase de Programación 2";
    char letra = 'h';
    printf("La letra %c ocurre %d veces\n", letra, ocurrencias(frase, strlen(frase), letra));
    return 0;
}