Compilare: main.cpp: In function 'void task3()': main.cpp:135:9: warning: unused variable 'NonZeroCol' [-Wunused-variable] 135 | int NonZeroCol[2], unuLin[2], unuCol[2], doiLin[2], doiCol[2], lastNonZeroLin, lastNonZeroCol; | ^~~~~~~~~~ main.cpp: In function 'void task2()': main.cpp:101:13: warning: 'lastCol' may be used uninitialized in this function [-Wmaybe-uninitialized] 101 | while(j < lastCol) | ~~^~~~~~~~~ main.cpp:87:13: warning: 'firstCol' may be used uninitialized in this function [-Wmaybe-uninitialized] 87 | while(j < firstCol) | ~~^~~~~~~~~~ main.cpp:108:13: warning: 'lastLin' may be used uninitialized in this function [-Wmaybe-uninitialized] 108 | while(i < lastLin) | ~~^~~~~~~~~ main.cpp:94:13: warning: 'firstLin' may be used uninitialized in this function [-Wmaybe-uninitialized] 94 | while(i < firstLin) | ~~^~~~~~~~~~