Compilare: user.cpp: In function ‘int main()’: user.cpp:34:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &t ) ; ^ user.cpp:36:65: 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%d", &x, &y, &z, &a, &b, &c, &n ) ; ^ user.cpp:39:26: warning: iteration 4 invokes undefined behavior [-Waggressive-loop-optimizations] matrez.mat[i][j] = 0 ; ~~~~~~~~~~~~~~~~~^~~ user.cpp:38:26: note: within this loop for (int j = 0 ; j <= 4 ; j++ ) { ~~^~~~