Compilare: user.cpp: In function ‘int main()’: user.cpp:16: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘long int*’ user.cpp:16: warning: format ‘%d’ expects type ‘int*’, but argument 4 has type ‘long int*’ user.cpp:64: warning: label ‘negativ’ defined but not used user.cpp:16: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result