Compilare: main.cpp: In function 'int main()': main.cpp:10:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&t); ^ main.cpp:14:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i][0]); ^ main.cpp:16:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i][j]); ^ main.cpp:9:15: warning: 'ac' may be used uninitialized in this function [-Wmaybe-uninitialized] int t,i,j,ac,elem=0; ^~