Compilare: user.cpp: In function ‘int main()’: user.cpp:17:41: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 3 has type ‘int*’ [-Wformat=] fscanf(input, "%ld %ld %ld", &a, &b, &c); ^ user.cpp:17:41: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 4 has type ‘int*’ [-Wformat=] user.cpp:17:41: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 5 has type ‘int*’ [-Wformat=] user.cpp:19:31: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf(output, "%ld", result); ^ user.cpp:17:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%ld %ld %ld", &a, &b, &c); ^