Compilare: user.cpp: In function ‘int main()’: user.cpp:13:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%c",&n,&c,&a); ^ user.cpp:17:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&a); ^ user.cpp:26:5: warning: ‘j1’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i=j1;i<=i1;i++) fprintf(g,"%c",b[i]+'A'); ^ user.cpp:26:5: warning: ‘i1’ may be used uninitialized in this function [-Wmaybe-uninitialized]