Compilare: main.cpp: In function 'int main()': main.cpp:24:30: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'int' [-Wformat=] fscanf( fin, "%d", x ); ^ main.cpp:12:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:24:31: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", x ); ^ main.cpp:17:16: warning: iteration 99999 invokes undefined behavior [-Waggressive-loop-optimizations] if( e[i] == i ) { ~~~^ main.cpp:16:19: note: within this loop for( i = 2; i <= M; i++ ) { ^ main.cpp:14:14: warning: iteration 99999 invokes undefined behavior [-Waggressive-loop-optimizations] e[i] = i; ~~~~~^~~ main.cpp:13:19: note: within this loop for( i = 2; i <= M; i++ ) { ^ main.cpp:24:31: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] fscanf( fin, "%d", x ); ^