Compilare: user.cpp: In function ‘int main()’: user.cpp:33: warning: conversion lacks type at end of format user.cpp:33: warning: too many arguments for format user.cpp:35: warning: conversion lacks type at end of format user.cpp:35: warning: too many arguments for format user.cpp:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: warning: ‘k’ is used uninitialized in this function user.cpp: In function ‘long int prim_k1(long int)’: user.cpp:16: warning: ‘pr’ may be used uninitialized in this function