Compilare: user.cpp: In function ‘void citire()’: user.cpp:20:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &r, &c); ^ user.cpp:28:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[i][j]); ^ user.cpp:40:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[j][i]); ^ user.cpp: In function ‘int main()’: user.cpp:124:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elimin.in", "r", stdin); ^ user.cpp:125:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("elimin.out", "w", stdout); ^ user.cpp: In function ‘void calculareSuma()’: user.cpp:64:9: warning: ‘tmp2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int tmp2; ^