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Ejercicio modificar frase, quita acentos y pone mayusculas

#include<stdio.h>
#include<ctype.h>
#include<string.h>
char *cambiar_frase(char frase[]){
    int cont=0,cont2=0,cont3=0;
    char aux[50];
    frase[cont]=toupper(frase[cont]);
    for(cont=0;frase[cont]!='\0';cont++){ 
        cont2=cont-cont3;   
        if(frase[cont]==' '){
             cont++;
             cont3++;
             frase[cont]=toupper(frase[cont]);
        }       
        aux[cont2]=frase[cont];
        printf(" cont=%d cont2=%d \n",cont,cont2);  
    }
    cont2++;
    aux[cont2]='\0';
    printf("%s",aux);   
    return;
}

main(){
    char frase[50];
    printf("Introduce frase a cambiar: ");
    gets(frase);
    cambiar_frase(frase);
    getchar();getchar();   
}
https://snipt.net/embed/63a16b998732bf469b2ccafe588369bf/
/raw/63a16b998732bf469b2ccafe588369bf/
63a16b998732bf469b2ccafe588369bf
c
C
30
2019-06-26T06:06:28
True
False
False
/api/public/snipt/27174/
ejercicio-modificar-frase-quita-acentos-y-pone-mayusculas
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a><span class="cp">#include</span><span class="cpf">&lt;stdio.h&gt;</span><span class="cp"></span> </span><span id="L-2"><a name="L-2"></a><span class="cp">#include</span><span class="cpf">&lt;ctype.h&gt;</span><span class="cp"></span> </span><span id="L-3"><a name="L-3"></a><span class="cp">#include</span><span class="cpf">&lt;string.h&gt;</span><span class="cp"></span> </span><span id="L-4"><a name="L-4"></a><span class="kt">char</span> <span class="o">*</span><span class="nf">cambiar_frase</span><span class="p">(</span><span class="kt">char</span> <span class="n">frase</span><span class="p">[]){</span> </span><span id="L-5"><a name="L-5"></a> <span class="kt">int</span> <span class="n">cont</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span><span class="n">cont2</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span><span class="n">cont3</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span> </span><span id="L-6"><a name="L-6"></a> <span class="kt">char</span> <span class="n">aux</span><span class="p">[</span><span class="mi">50</span><span class="p">];</span> </span><span id="L-7"><a name="L-7"></a> <span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]</span><span class="o">=</span><span class="n">toupper</span><span class="p">(</span><span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]);</span> </span><span id="L-8"><a name="L-8"></a> <span class="k">for</span><span class="p">(</span><span class="n">cont</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span><span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]</span><span class="o">!=</span><span class="sc">&#39;\0&#39;</span><span class="p">;</span><span class="n">cont</span><span class="o">++</span><span class="p">){</span> </span><span id="L-9"><a name="L-9"></a> <span class="n">cont2</span><span class="o">=</span><span class="n">cont</span><span class="o">-</span><span class="n">cont3</span><span class="p">;</span> </span><span id="L-10"><a name="L-10"></a> <span class="k">if</span><span class="p">(</span><span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]</span><span class="o">==</span><span class="sc">&#39; &#39;</span><span class="p">){</span> </span><span id="L-11"><a name="L-11"></a> <span class="n">cont</span><span class="o">++</span><span class="p">;</span> </span><span id="L-12"><a name="L-12"></a> <span class="n">cont3</span><span class="o">++</span><span class="p">;</span> </span><span id="L-13"><a name="L-13"></a> <span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]</span><span class="o">=</span><span class="n">toupper</span><span class="p">(</span><span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">]);</span> </span><span id="L-14"><a name="L-14"></a> <span class="p">}</span> </span><span id="L-15"><a name="L-15"></a> <span class="n">aux</span><span class="p">[</span><span class="n">cont2</span><span class="p">]</span><span class="o">=</span><span class="n">frase</span><span class="p">[</span><span class="n">cont</span><span class="p">];</span> </span><span id="L-16"><a name="L-16"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot; cont=%d cont2=%d </span><span class="se">\n</span><span class="s">&quot;</span><span class="p">,</span><span class="n">cont</span><span class="p">,</span><span class="n">cont2</span><span class="p">);</span> </span><span id="L-17"><a name="L-17"></a> <span class="p">}</span> </span><span id="L-18"><a name="L-18"></a> <span class="n">cont2</span><span class="o">++</span><span class="p">;</span> </span><span id="L-19"><a name="L-19"></a> <span class="n">aux</span><span class="p">[</span><span class="n">cont2</span><span class="p">]</span><span class="o">=</span><span class="sc">&#39;\0&#39;</span><span class="p">;</span> </span><span id="L-20"><a name="L-20"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;%s&quot;</span><span class="p">,</span><span class="n">aux</span><span class="p">);</span> </span><span id="L-21"><a name="L-21"></a> <span class="k">return</span><span class="p">;</span> </span><span id="L-22"><a name="L-22"></a><span class="p">}</span> </span><span id="L-23"><a name="L-23"></a> </span><span id="L-24"><a name="L-24"></a><span class="n">main</span><span class="p">(){</span> </span><span id="L-25"><a name="L-25"></a> <span class="kt">char</span> <span class="n">frase</span><span class="p">[</span><span class="mi">50</span><span class="p">];</span> </span><span id="L-26"><a name="L-26"></a> <span class="n">printf</span><span class="p">(</span><span class="s">&quot;Introduce frase a cambiar: &quot;</span><span class="p">);</span> </span><span id="L-27"><a name="L-27"></a> <span class="n">gets</span><span class="p">(</span><span class="n">frase</span><span class="p">);</span> </span><span id="L-28"><a name="L-28"></a> <span class="n">cambiar_frase</span><span class="p">(</span><span class="n">frase</span><span class="p">);</span> </span><span id="L-29"><a name="L-29"></a> <span class="n">getchar</span><span class="p">();</span><span class="n">getchar</span><span class="p">();</span> </span><span id="L-30"><a name="L-30"></a><span class="p">}</span> </span></pre></div> </td></tr></table>
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