Hi, my program does not do the expected things, printf a unsigned long long int.
#include <aduc7026.h> #include"stdio.h" void RS232_init(void); int main (void) { unsigned long long int A; RS232_init(); printf("Start \n"); while(1) { while(1) { printf("Enter a Hex-number\n"); if (scanf("%X",&A)) break; scanf("%*"); //Clearing scanf input stream } printf ("Your input %64.64lX\n",A); A *= A; printf ("The result %64.64lX\n",A); } } void RS232_init(void) { GP1CON = 0x011; // Setup tx & rx pins on P1.0 and P1.1 // Start setting up UART at 9600bps COMCON0 = 0x080; // Setting DLAB COMDIV0 = 0x088; // Setting DIV0 and DIV1 to DL calculated COMDIV1 = 0x000; COMCON0 = 0x007; // Clearing DLAB }
I just want to force printf to give me unsigned long long integer for example 0x11111111 * 0x11111111 i expect 0x0123456787654321 but the result from printf is only 000000000087654321. What a mess! I'am very very disapointed! Maybe the compiler does not recognize "unsigned long long integer"? But there's no error-message! Who can help?
I just want to force printf to give me unsigned long long integer Then why are you telling printf that the length is long integer (l) instead of long long integer (ll) ?
"Maybe the compiler does not recognize 'unsigned long long integer'?" The compiler recognises it, and the compiler has given you one. However, you have told printf to print a long, and that's exactly what it has done - it has printed a long which is precisely one half of the long long that you supplied! As a programmer with 10 years 8051 assembler experience, you should understand that silly things will happen if you supply inconsistent parameters to a fucntion call! "But there's no error-message!" That's because the program is perfectly valid. That problem is that your program does not actually describe what you want it to do. Again, as a programmer with 10 years 8051 assembler experience, you should realise program execution is a YAFIYGI process: "You Asked For It; You Got It!" You really do need to sit down with a basic 'C' textbook and start with the basics before you go running & jumping into the deep end before you can walk or swim!