Compilare: main.cpp: In function 'void calc(int)': main.cpp:9:12: warning: unused variable 'q' [-Wunused-variable] double q; ^ main.cpp: In function 'int main()': main.cpp:25:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d",&cer,&n,&k); ^ main.cpp:27:94: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lf%lf%lf%lf%lf%lf",&v[i][0],&v[i][1],&v[i][2],&v[i][3],&v[i][4],&v[i][5]); ^