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Asked: 2026-05-28T19:15:49+00:00

Ive narrowed the issue down to a few lines of code but im having

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Ive narrowed the issue down to a few lines of code but im having trouble identifying what is illegal about the function call causing a “Access violation writing location” I was hoping someone better with C could help me out?

The input the code is breaking on is 

vn 0.185492 -0.005249 0.982604

I want to assign the 3 float values to an Array of Struct vn

struct Normals{
    float vn1;
    float vn2;
    float vn3;
};
struct Normals vn[50000];

and the code that is crashing is

if (line[0] == 'v' && line[1] == 'n' && line[1] != 't'){
    sscanf(line, "%*c%*c%f%f%f", 
            &vn[normCount].vn1, 
            &vn[normCount].vn2, 
            vn[normCount].vn3);
    normCount++;
    }

Any tips would be great! Thanks

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1 Answer

  1. Editorial Team

    You forgot the & before vn[normCount].vn3.

    By the way, what is the point of line[1] == 'n' && line[1] != 't'?

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