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POC program not entering for loop, but executing everything right up until it
 

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  1. POC program not entering for loop, but executing everything right up until it
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    <p>for some reason when running a program it refuses to enter a for loop, and rather just hangs. </p> <pre><code>main() { char *buffer; int chunk_offset, current_chunk_number, total_chunks; int filelen; filelen = ReadFileintoBuffer( buffer); printf("file read \n"); // error break point 1 int events = filelen/eventlen; // number of 512 + 2 32 bit events events with timecode int sp = 0; int i,j; int toterror[25]; printf("file of length %d has %d events \n", filelen, events); printf(" i = %d \n", i); for( i = 0; i &lt; events; i++) { printf("analyzed %d events of %d", i, events); sp=0; int error[13]; Analyzeevent(buffer+i*eventlen, error); if(error[0]) { sp = 12; } for( j =1; j &lt; 13; j++) { toterror[j+sp] += error[j]; } } printf("post for loop"); Printerrs(toterror, events); exit(0); } </code></pre> <p>It prints everything down to i = (9727988 in this particular case), then nothing. it all just stops. any idea what happened? i learned c++ and programming in c is very strange and awkward for me right now. compiler doesnt throw up any warnings or anything</p> <p>thank you for your help in advance.</p> <p>edit: for ring0 heres the code to ReadFileintoBuffer:</p> <pre><code>int ReadFileintoBuffer( char *buffer) { int filelen; char text[200]; printf("Input File: " ); scanf( "%s" ,text); FILE *file = 0; int i; //Open file file = fopen(text, "rb"); if (!file) { fprintf(stderr, "Unable to open file \n"); exit(0); } //Get file length fseek(file, 0, SEEK_END); // find the end of the file filelen=ftell(file); // set the current pointer (currently at end from above) as file length fseek(file, 0, SEEK_SET); // set pointer back to beginning of file //Allocate memory buffer=(char *)malloc(filelen+1); if (!buffer) { fprintf(stderr, "Memory error! \n"); fclose(file); return; } //Read file contents into buffer fread(buffer, filelen, 1, file); fclose(file); // clse the file, all in buffer now return filelen; } </code></pre>
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    1. CODid you habitually omit the return type of the `main` function in C++? K&R C assumes default `int`, but that's not the case with ANSI C and hasn't been considered "best practice" for quite some time...
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    2. COAlso, have you stepped through the code with a debugger? It's likely that the value of `events` is such that it is always less than 0, causing the `for` loop not to run. You'd see the same behavior in your more familiar C++.
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      1. USCody Gray
    3. COYou are not using a debugger. As soon as you start to use a debugger, the problem will become immediately obvious.
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      1. USabelenky
 

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