{"id":31863,"date":"2023-01-25T04:28:49","date_gmt":"2023-01-24T22:58:49","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-dynamically-allocate-memory-in-2d-array-and-store-values-closed\/"},"modified":"2023-01-25T04:28:49","modified_gmt":"2023-01-24T22:58:49","slug":"solved-how-to-dynamically-allocate-memory-in-2d-array-and-store-values-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-dynamically-allocate-memory-in-2d-array-and-store-values-closed\/","title":{"rendered":"[Solved] How to dynamically allocate memory in 2D array and store values? [closed]"},"content":{"rendered":"

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As i said problem is in scanning N<\/code> and M<\/code> variables.<\/p>\n

Change<\/p>\n

scanf(\"%d %d\",&N,&N);\n<\/code><\/pre>\n
to<\/p>\n
scanf(\"%d\",&N);\nscanf(\"%d\",&M);\n<\/code><\/pre>\n
and you are fine.<\/p>\n
Problem was you were reading N<\/code> twice while didnt read an M<\/code> which was used uninitialized.<\/p>\n
Non-static variables (local variables) are indeterminate<\/em>. Reading them prior to assigning a value results in undefined behavior.<\/p>\n
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You should free all your allocated memory<\/p>\n
for(i=0;i<N;i++)\n{\n    free(A[i]);\n}\nfree(A);\n<\/code><\/pre>\n
and dont cast malloc()<\/code>‘s return value becouse<\/p>\n