Eroare de compilare: user.c: In function ‘expo’: user.c:29:9: error: too few arguments to function ‘multi’ return multi(a, expo(a, (b-1)/2, c)); ^ user.c:3:11: note: declared here long long multi(long long a, long long b, long long c){ ^ user.c:31:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:43:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &A); ^ user.c:44:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &B); ^ user.c:45:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &C); ^