/*Enter two numbers like 123 456 (Dont put too big num it will not be alligned properly ) [challenge] Multiply two numbers like on paper Multiply two numbers with more than two digits each. Your program should only be able to multiply one-digit-numbers. so 343 x 281 1*3+1*4 add 0 + 1*3 add 00 for adding 0 it is allowed to multiply with 10 Additionally think about a program that only is able to add to one-digit-numbers. */ #include #include//pow() #include//setfill(),setw() using namespace std; void space(int i,int var,bool symb){ int k; if(symb==1) { k=4;} else {k=5;} for(int j=0;j>firs>>sec; seccpy=sec; seccpy1=sec; firscpy=firs; int j=0,n=0; for(;firscpy>0;firscpy/=10) { n++; //how many numbers does int firs have? } for(;seccpy>0;seccpy/=10) { j++; //how many numbers does int sec have? } int array[15],i=0; int value; if(j){ if(j>0) {j-=1;} else {j=0;} } if(j!=0){ div=pow(10,j); if(div%10!=0){ div+=1;} } while(div>0) { value=sec/div; sec%=div; array[i]=value*firs; i++; div/=10; } if(j==0){ array[0]=seccpy1; i=1;} int array1[i],m=0; for(int b=i-1;b>=0;b--) { array1[b]=array[m]; m++; } space(i,firs,0); space(i,seccpy1,1); cout<<" -----------\n"; int spa=i+5; for(int z=0;z=100000*100000) { space(i-5,result,0);return 0;} else if(result>=10000*10000) { space(i-4,result,0);return 0;} else if(result>=1000*1000) { space(i-3,result,0);return 0;} else if(result>=100*100) {space(i-2,result,0);return 0;} else if(result>=10*10) {space(i-1,result,0);return 0;} else if(result>10) {space(i,result,0);return 0;} }

Multiplication Like on Paper