Compilare: main.cpp: In function 'int main()': main.cpp:31:36: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat=] fprintf(fptr1, "%d", num + num1); ^ main.cpp:25:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fptr,"%ld", &num); ^ main.cpp:27:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fptr,"%ld", &num1); ^