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POFind the largest sum of 3 consecutive digits from number
 

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  1. POFind the largest sum of 3 consecutive digits from number
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    <p>I have a task to write the C program that finds the largest sum of 3 consecutive digits in numbers. I wrote it, but I have trouble: the program seems to work fine, but instead of correct answer it types some strange numbers. For example, if input is "560315", the response is "155". However, if I type "560415" the answer is still "155" and if I type "561315" the response changes to "156". Is it a problem with encoding? Here's the code:</p> <pre><code>#include &lt;stdio.h&gt; int isempt(int a) { if ((a==' ')||(a=='\n')||(a=='\t')) { return 1; } else return 0; } main() { int a, b, c, d, e, i, maxsum; a = 0; b = 0; c = 0; d = 0; maxsum = 0; i = 0; int counter = 0; //the variables "numsearch" and "inside" indicate whether program is in the number or outside it int numsearch = 1; int inside = 0; while ((i = getchar())!=EOF) { if (numsearch==1) { if (isempt(i)==0) { numsearch = 0; inside = 1; a = i; counter++; } } else if ((isempt(i)==0)&amp;&amp;(inside==1)) { if (counter == 1) { b = i; counter++; } else if (counter == 2) { c = i; counter++; } else if (counter == 3) { d = i; maxsum = a+b+c; if ((b+c+d) &gt; maxsum) { maxsum =( b+c+d); } a =b; b = c; c = d; counter++; } else if (counter == 4) { d = i; if ((b+c+d)&gt;maxsum) { maxsum = b+c+d; } a=b; b=c; c=d; } } else if ((counter&gt;=3)&amp;&amp;(isempt(i)==1)) { printf("\n%d\n", maxsum ); counter = 0; numsearch = 1; inside = 0; a = 0; b = 0; c = 0; d = 0; } else { counter = 0; numsearch = 1; inside = 0; a = 0; b = 0; c = 0; d = 0; } } } </code></pre>
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    1. COit's meant to find the 3 largest digits and then sum them? so 560315 should produce 16?
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      1. USTom Tanner
    2. COYou're calculating with ASCII character values, not with numerical digits!!
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    3. CO@TomTanner No I believe the answer should be 11, it's the sum of 560
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