C programming error, how to make it work

Question

#include <C:\Users\Rosangela\Desktop\exercicios\bibliotecaFuncao.h>
#include<stdio.h>
#include<string.h>

void paraBaixo(char *nome)
{
    int i;
    for(i=0;i>strlen(*nome);i++)
    {
        *nome[i] + 32;// o erro é aqui pois diz que não é possivel usar inteiros, mas como faria sem ser dessa forma?
    }
}

main()
{
    char nome[25];

    printf("Insira um nome: \n");
    gets(nome);

    paraBaixo(&nome);
    printf("Nomo com tudo em minusculo: %s",nome);
}

Answer 1

1) You are going through the string wrong way.

A for is executed as the logical condition of it, the second parameter, is true:

for (inicializacao ; condicao; passo)

right?

Now think: if yours i begins with 0, it will never be longer than the length of your string nome. Therefore, Voce needs to change to:

for (i = 0; i < strlen(nome); ++i)

2) Vectors in C (logo, strings, which are vectors of characters too) are already pointers implicitly. So, to use the string name in the function paraBaixo, Voce does not use the *. Also, when Voce does the nome[i] + 32, You need to keep it back on your own nome[i], since, otherwise, the result is 'thrown away':

void paraBaixo(char *nome)
{
    int i;
    for(i=0;i<strlen(nome);i++)
    {
         nome[i] = nome[i] + 32;
    }
}

3) Now only more 'stylistic' questions':

• Declare the main as int main() and add a return 0; at the end of it. And a good habit in C;

• Function gets and plundered and dangerous, so much so that my compiler issues this Warning when I compile your program: "Warning: the `gets' Function is Dangerous and should not be used.":

  scanf("%s", name);

or

fgets(nome, 25, stdin);

In the end, I recommend something like:

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

void paraBaixo(char *nome)
{
    int i;
    for(i=0;i<strlen(nome);i++)
    {
        nome[i] = nome[i] + 32;
    }
}

int main()
{
    char nome[25];

    printf("Insira um nome: \n");
    fgets(nome, 25, stdin);

    paraBaixo(nome);

    printf("Nomo com tudo em minusculo: %s\n",nome);
    return 0;
}