Multiplication (pitagoric) table help

[Mago Marco]

Hallo to everyone.
I'm trying to do a c++ program that displays multiplication (pitagoric) table's diagonals.
I've done this:

#include <stdio.h>
#include <stdlib.h>
main(){
	int a,b,c,d,prodotto;
	c=1;
	d=10;
	printf("#########################################\n######\t\t\t\t\t#\n######  1  2  3  4  5  6  7  8  9  10   #\n######\t\t\t\t\t#\n#########################################\n#    #\t\t\t\t\t#\n");
	for (a=1; a<=10; a++){
		if (a==10){
			printf("# %d #  ",a);
		}
		else{
			printf("#  %d #  ",a);
		}
		for (b=1; b<=10; b++){
			if (b==c) {
				prodotto=a*b;
				printf("%d ",prodotto);
				}
			if (b==d) {
					prodotto=a*b;
					printf("%d ",prodotto);
				}
				else{
					prodotto=a*b;
					printf("   ");
				}
		}
		c++;
		d--;
		printf("\n#    #\t\t\t\t\t#\n");
		}
		printf("###### # # # # # # # # # # # # # # # # ##");
system ("pause>nul");
	}

but the output is this:

#########################################
######                                  #
######  1  2  3  4  5  6  7  8  9  10   #
######                                  #
#########################################
#    #                                  #
#  1 #  1                            10
#    #                                  #
#  2 #     4                      18
#    #                                  #
#  3 #        9                24
#    #                                  #
#  4 #           16          28
#    #                                  #
#  5 #              25    30
#    #                                  #
#  6 #              30 36
#    #                                  #
#  7 #           28       49
#    #                                  #
#  8 #        24             64
#    #                                  #
#  9 #     18                   81
#    #                                  #
# 10 #  10                         100
#    #                                  #
###### # # # # # # # # # # # # # # # # ##

in the first part of the "d" diagonal it puts some spaces I don't want (now i re-paste the output replacing them whit an "@")

#########################################
######                                  #
######  1  2  3  4  5  6  7  8  9  10   #
######                                  #
#########################################
#    #                                  #
#  1 #  1              @@            10
#    #                                  #
#  2 #     4           @@         18
#    #                                  #
#  3 #        9        @@      24
#    #                                  #
#  4 #           16    @@    28
#    #                                  #
#  5 #              25 @@ 30
#    #                                  #
#  6 #              30 36
#    #                                  #
#  7 #           28       49
#    #                                  #
#  8 #        24             64
#    #                                  #
#  9 #     18                   81
#    #                                  #
# 10 #  10                         100
#    #                                  #
###### # # # # # # # # # # # # # # # # ##

What did I do wrong?

[keskiverto]

I'm trying to do a c++ program

First, printf is traditionally C, while C++ has streams.

Second, you can specify field-width in the format for printf. That should simplify your math.