Compilare: user.c: In function ‘main’: user.c:10:2: warning: conversion lacks type at end of format [-Wformat=] fscanf(fin,"%l", a); ^ user.c:10:2: warning: too many arguments for format [-Wformat-extra-args] user.c:11:2: warning: conversion lacks type at end of format [-Wformat=] fscanf(fin,"%l", b); ^ user.c:11:2: warning: too many arguments for format [-Wformat-extra-args] user.c:12:2: warning: conversion lacks type at end of format [-Wformat=] fprintf(fout,"%l", a + b); ^ user.c:12:2: warning: too many arguments for format [-Wformat-extra-args] user.c:14:2: warning: implicit declaration of function ‘close’ [-Wimplicit-function-declaration] close(fin); ^ user.c:10:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%l", a); ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%l", b); ^ user.c:10:8: warning: ‘a’ is used uninitialized in this function [-Wuninitialized] fscanf(fin,"%l", a); ^ user.c:11:8: warning: ‘b’ is used uninitialized in this function [-Wuninitialized] fscanf(fin,"%l", b); ^