Compilare: user.c: In function ‘main’: user.c:8:5: warning: unknown conversion type character 0x20 in format [-Wformat=] fscanf(fp,"%l %l",&a,&b); ^ user.c:8:5: warning: conversion lacks type at end of format [-Wformat=] user.c:8:5: warning: too many arguments for format [-Wformat-extra-args] user.c:16:5: warning: conversion lacks type at end of format [-Wformat=] fprintf(fout,"%l",b); ^ user.c:16:5: warning: too many arguments for format [-Wformat-extra-args] user.c:8:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%l %l",&a,&b); ^