Eroare de compilare: user.c:14:11: warning: conflicting types for built-in function ‘pow’ long long pow( long long base, int exp ) { ^~~ user.c:37:34: error: expected ‘;’, ‘,’ or ‘)’ before ‘=’ token void fft( int* v, int N, int inv = 1 ) { ^ user.c: In function ‘multiply’: user.c:78:5: warning: implicit declaration of function ‘fft’ [-Wimplicit-function-declaration] fft( a, N ); ^~~ user.c: In function ‘main’: user.c:91:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for ( fscanf( fin, "%d", &t ); t > 0; t -- ) { ^~~~~~~~~~~~~~~~~~~~~~~ user.c:97:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^~~~~~~~~~~~~~~~~~~~~~~ user.c:100:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &nr ); ^~~~~~~~~~~~~~~~~~~~~~~~ user.c:105:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &m ); ^~~~~~~~~~~~~~~~~~~~~~~ user.c:108:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &nr ); ^~~~~~~~~~~~~~~~~~~~~~~~