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copied!<p>I am working a piece of code which reads data from a file and manipulates it. The idea is to load the data in a global manner and then use several functions on the data to perform calculations. The problem I am having is that when compile I get the following error :</p> <blockquote> <p>' vertices' undeclared (first use in this function).</p> </blockquote> <p>Header file contains the following :</p> <pre><code>typedef struct { double x; double y; double z; } variable; </code></pre> <p>In the main I call malloc and a function which will use this array of <strong>'variable'</strong> called 'vertices':</p> <pre><code>int main (void) { variable *vertices = (variable*) malloc( 5000 * sizeof (variable) ) ; load_file(); free(vertices); return 0; } </code></pre> <p>The function load_file ():</p> <pre><code> FILE *fp1 ; fp1 = fopen( 'file',"r"); if (fp1==NULL) { printf("File couldn't be opened or read!"); return 1; } int j = 0; while(fscanf(fp1, "%lf %lf %lf ", &vertices[j].x, &vertices[j].y, &vertices[j].z ) == 3 ) { j++; } fclose(fp1); </code></pre> <p>In reality when I put the malloc in <strong>load_file</strong>, it compiles and works but the problem is that I have various other functions which will use the data and if I free it in load_file, I lose everything. If I redefine the typedef above main, I get a <strong>'previous definition was here'</strong> and if I add <strong>variable vertices;</strong> before main, a get a load of errors.</p> <p>How would I solve such an issue? </p>

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