Eroare de compilare: user.c: In function ‘main’: user.c:3:15: error: ‘a’ undeclared (first use in this function) #define SWAP (a, b){\ ^ user.c:37:1: note: in expansion of macro ‘SWAP’ SWAP(M, N); ^ user.c:3:15: note: each undeclared identifier is reported only once for each function it appears in #define SWAP (a, b){\ ^ user.c:37:1: note: in expansion of macro ‘SWAP’ SWAP(M, N); ^ user.c:3:18: error: ‘b’ undeclared (first use in this function) #define SWAP (a, b){\ ^ user.c:37:1: note: in expansion of macro ‘SWAP’ SWAP(M, N); ^ user.c:3:16: warning: left-hand operand of comma expression has no effect [-Wunused-value] #define SWAP (a, b){\ ^ user.c:37:1: note: in expansion of macro ‘SWAP’ SWAP(M, N); ^ user.c:3:20: error: expected ‘;’ before ‘{’ token #define SWAP (a, b){\ ^ user.c:37:1: note: in expansion of macro ‘SWAP’ SWAP(M, N); ^ user.c:34:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &M); ^ user.c:35:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%d", &N); ^ user.c:41:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%c", &matrix[i][j]); ^ user.c:43:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%c", &matrix[i][j]); ^