Compilare: main.c: In function 'main': main.c:22:26: warning: passing argument 2 of 'fprintf' makes pointer from integer without a cast [-Wint-conversion] fprintf(outFile, printf("0")); ^~~~~~ In file included from /usr/include/stdio.h:936:0, from main.c:1: /usr/include/x86_64-linux-gnu/bits/stdio2.h:95:1: note: expected 'const char * restrict' but argument is of type 'int' fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...) ^~~~~~~ main.c:22:9: warning: format not a string literal and no format arguments [-Wformat-security] fprintf(outFile, printf("0")); ^~~~~~~ main.c:26:27: warning: passing argument 2 of 'fprintf' makes pointer from integer without a cast [-Wint-conversion] fprintf (outFile, printf("%lld", b) ); ^~~~~~ In file included from /usr/include/stdio.h:936:0, from main.c:1: /usr/include/x86_64-linux-gnu/bits/stdio2.h:95:1: note: expected 'const char * restrict' but argument is of type 'int' fprintf (FILE *__restrict __stream, const char *__restrict __fmt, ...) ^~~~~~~ main.c:26:9: warning: format not a string literal and no format arguments [-Wformat-security] fprintf (outFile, printf("%lld", b) ); ^~~~~~~ main.c:9:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(infile, "%lld %lld", &a, &b); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~