Compilare: user.cpp: In function ‘int main()’: user.cpp:14:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d ", &n); ^ user.cpp:16:88: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d %d %d %d %d", &a[i], &b[i], &c[i], &d[i], &e[i], &f[i]); ^ user.cpp:18:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d", &x4, &y4); ^ user.cpp:80:37: warning: ‘yy1’ may be used uninitialized in this function [-Wmaybe-uninitialized] ar11=(x1*y2+x2*b[i]+a[i]*y1-y2*a[i]-b[i]*x1-y1*x2)/2; ^ user.cpp:80:27: warning: ‘xx2’ may be used uninitialized in this function [-Wmaybe-uninitialized] ar11=(x1*y2+x2*b[i]+a[i]*y1-y2*a[i]-b[i]*x1-y1*x2)/2; ^ user.cpp:80:43: warning: ‘yy2’ may be used uninitialized in this function [-Wmaybe-uninitialized] ar11=(x1*y2+x2*b[i]+a[i]*y1-y2*a[i]-b[i]*x1-y1*x2)/2; ^ user.cpp:10:87: warning: ‘xx3’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ar11, ar12, ar13, ar21, ar22, ar23, ar31, ar32, ar33, rr, xx1, yy1, xx2, yy2, xx3, yy3, n, max, poz, i, x1, y1, x2, y2, x3, y3, atot, x4, y4, r, a1, a2, a3, cp; ^ user.cpp:10:92: warning: ‘yy3’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ar11, ar12, ar13, ar21, ar22, ar23, ar31, ar32, ar33, rr, xx1, yy1, xx2, yy2, xx3, yy3, n, max, poz, i, x1, y1, x2, y2, x3, y3, atot, x4, y4, r, a1, a2, a3, cp; ^ user.cpp:79:13: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(i!=poz) { ^ user.cpp:10:67: warning: ‘xx1’ may be used uninitialized in this function [-Wmaybe-uninitialized] int ar11, ar12, ar13, ar21, ar22, ar23, ar31, ar32, ar33, rr, xx1, yy1, xx2, yy2, xx3, yy3, n, max, poz, i, x1, y1, x2, y2, x3, y3, atot, x4, y4, r, a1, a2, a3, cp; ^