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POSimple C Program To Convert Two Digits Into Words
 

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  1. POSimple C Program To Convert Two Digits Into Words
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    <p>What I am trying to do is to write a program wherein you input two digits and then they are converted into words which gets printed. The problem is that this program hangs after you input the two digits and I have no idea why. Any and all help is appreciated. I am a beginner and all I can use to solve this is basically if and switch. Thanks again.</p> <pre><code>#include &lt;stdio.h&gt; int main (void) { int firstNum, secondNum; printf("Enter a two digit number: "); scanf("%d%d", &amp;firstNum,&amp;secondNum); if (firstNum == 1 &amp;&amp; secondNum == 0){ printf("You entered the number ten\n");} if (firstNum == 1 &amp;&amp; secondNum == 1){ printf("You entered the number eleven\n");} if (firstNum == 1 &amp;&amp; secondNum == 2){ printf("You entered the number twelve\n");} if (firstNum == 1 &amp;&amp; secondNum == 3){ printf("You entered the number thirteen\n");} if (firstNum == 1 &amp;&amp; secondNum == 4){ printf("You entered the number forteen\n");} if (firstNum == 1 &amp;&amp; secondNum == 5){ printf("You entered the number fifteen\n");} if (firstNum == 1 &amp;&amp; secondNum == 6){ printf("You entered the number sixteen\n");} if (firstNum == 1 &amp;&amp; secondNum == 7){ printf("You entered the number seventeen\n");} if (firstNum == 1 &amp;&amp; secondNum == 8){ printf("You entered the number eighteen\n");} if (firstNum == 1 &amp;&amp; secondNum == 9){ printf("You entered the number nineteen\n");} switch(firstNum){ case 2: printf("You entered the number twenty-");break; case 3: printf("You entered the number thirty-");break; case 4: printf("You entered the number forty-");break; case 5: printf("You entered the number fifty-");break; case 6: printf("You entered the number sixty-");break; case 7: printf("You entered the number seventy-");break; case 8: printf("You entered the number eighty-");break; case 9: printf("You entered the number ninty-");break; } switch (secondNum){ case 1: printf("one.\n");break; case 2: printf("two.\n");break; case 3: printf("three.\n");break; case 4: printf("four.\n");break; case 5: printf("five.\n");break; case 6: printf("six.\n");break; } return 0; } </code></pre>
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    1. COHow exactly does it hand? Do you get a segmentation fault (access violation)?
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    2. COAlso, note that `%d` reads a whole number, not just 1 digit. If you want to read two numbers they should be space-separated and you should use `"%d %d"` (with space). If you want to read two digits, you should read with `scanf("%c%c", &digit1, &digit2);` (digits are `char`) and then convert them to number: `firstNum = digit1 - '0';`
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    3. COWhy not use `scanf("%d" &num);` and then check that it's two digits (i.e. `num > 0 && num < 100`)? Then use division and modulo for values of ten and less or 20 and higher.
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      1. USSome programmer dude
 

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