Compilare: main.c: In function 'main': main.c:33:7: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%d",&g); ^~~~~~~~~~~~~~~~~~ main.c:34:7: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%f",&w); ^~~~~~~~~~~~~~~~~~ main.c:39:10: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%lf %lf",&G_list[i].energie,&G_list[i].cost); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:67:7: warning: 'c_actual' may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fp,"%d",(int)c_actual); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:26:11: warning: 'e_actuala' may be used uninitialized in this function [-Wmaybe-uninitialized] float e_actuala,e_maxima,c_actual,w; ^~~~~~~~~