Compilare: main.cpp: In function 'int main()': main.cpp:10:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ main.cpp:13:32: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^ main.cpp:41:29: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<maxim<<" "<<l<<" "<<c; ^ main.cpp:41:23: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<maxim<<" "<<l<<" "<<c; ^~~