Bài 47 : Hãy tính tổng các chữ số chẵn của số nguyên dương n

Tải code tại đây

#include<stdio.h> #include<conio.h> void demchuso(int &n) { do{ printf("Nhap vao so nguyen duong n(n>=0):n="); scanf("%d",&n); if(n<0) printf("So ban nhap vao khong hop le!Xin vui long nhap lai!\n"); else break; }while(n<0); if(n>=0&&n<=9) printf("\nSo %d co 1 chu so",n); if(n>=10&&n<=99) printf("\nSo %d co 2 chu so",n); if(n>=100&&n<=999) printf("\nSo %d co 3 chu so",n); if(n>=1000&&n<=9999) printf("\nSo %d co 4 chu so",n); if(n>=10000&&n<=99999) printf("\nSo %d co 5 chu so",n); } void lietkechuso(int n) { printf("\nCac chu so cua so %d la:",n); if(n>=0&&n<=9) printf("%4d",n); if(n>=10&&n<=99) { int a=n/10; int b=n%10; printf("%4d",a); printf("%4d",b); } if(n>=100&&n<=999) { int c=n%10; int d=n/10; int e=d/10; int f=d%10; printf("%4d",e); printf("%4d",f); printf("%4d",c); } if(n>=1000&&n<=9999) { int g=n%10; int h=n/10; int i=h%10; int j=h/10; int k=j%10; int l=j/10; printf("%4d",l); printf("%4d",k); printf("%4d",i); printf("%4d",g); } if(n>=10000&&n<=99999) { int m=n%10; int o=n/10; int p=o%10; int q=o/10; int r=q%10; int s=q/10; int t=s%10; int u=s/10; printf("%4d",u); printf("%4d",t); printf("%4d",r); printf("%4d",p); printf("%4d",m); } } void tongcacchusochan(int n) { printf("\nTong cac chu so chan so %d la:",n); if(n>=0&&n<=9) { if(n%2==0) printf("%4d",n); } if(n>=10&&n<=99) { int a=n/10; int b=n%10; if(a%2==0&&b%2==0) { int ab=a+b; printf("%4d",ab); } if(a%2==0&&b%2!=0) printf("%4d",a); if(b%2==0&&a%2!=0) printf("%4d",b); } if(n>=100&&n<=999) { int c=n%10; int d=n/10; int e=d/10; int f=d%10; if(e%2==0&&f%2==0&&c%2==0) { int w=e+f+c; printf("%4d",w); } // xét lần lượt từng chữ số if(e%2==0&&f%2!=0&&c%2!=0) printf("%4d",e); if(e%2!=0&&f%2==0&&c%2!=0) printf("%4d",f); if(e%2!=0&&f%2!=0&&c%2==0) printf("%4d",c); // xét lần lượt 2 chữ số if(e%2==0&&f%2==0&&c%2!=0) { int ab=e+f; printf("%4d",ab); } if(e%2!=0&&f%2==0&&c%2==0) { int bc=f+c; printf("%4d",bc); } if(e%2==0&&f%2!=0&&c%2==0) { int cd=e+c; printf("%4d",cd); } } if(n>=1000&&n<=9999) { int g=n%10; int h=n/10; int i=h%10; int j=h/10; int k=j%10; int l=j/10; if(l%2==0&&k%2==0&&i%2==0&&g%2==0) { int x=l+k+i+g; printf("%4d",x); } // xét lần lượt từng chữ số if(l%2==0&&k%2!=0&&i%2!=0&&g%2!=0) printf("%4d",l); if(l%2!=0&&k%2==0&&i%2!=0&&g%2!=0) printf("%4d",k); if(l%2!=0&&k%2!=0&&i%2==0&&g%2!=0) printf("%4d",i); if(l%2!=0&&k%2!=0&&i%2!=0&&g%2==0) printf("%4d",g); // xét lần lượt 2 chữ số if(l%2==0&&k%2==0&&i%2!=0&&g%2!=0) { int de=l+k; printf("%4d",de); } if(l%2!=0&&k%2==0&&i%2==0&&g%2!=0) { int ef=k+i; printf("%4d",ef); } if(l%2!=0&&k%2!=0&&i%2==0&&g%2==0) { int fg=i+g; printf("%4d",fg); } if(l%2==0&&k%2!=0&&i%2!=0&&g%2==0) { int gh=l+g; printf("%4d",gh); } if(l%2==0&&k%2!=0&&i%2==0&&g%2!=0) { int hi=l+i; printf("%4d",hi); } if(l%2!=0&&k%2==0&&i%2!=0&&g%2==0) { int ij=k+g; printf("%4d",ij); } // xét lần lượt 3 chữ số if(l%2==0&&k%2==0&&i%2==0&&g%2!=0) { int jk=l+k+i; printf("%4d",jk); } if(l%2==0&&k%2==0&&i%2!=0&&g%2==0) { int kl=l+k+g; printf("%4d",kl); } if(l%2==0&&k%2!=0&&i%2==0&&g%2==0) { int lm=l+i+g; printf("%4d",lm); } if(l%2!=0&&k%2==0&&i%2==0&&g%2==0) { int mn=k+i+g; printf("%4d",mn); } } if(n>=10000&&n<=99999) { int m=n%10; int o=n/10; int p=o%10; int q=o/10; int r=q%10; int s=q/10; int t=s%10; int u=s/10; if(u%2==0&&t%2==0&&r%2==0&&p%2==0&&m%2==0) { int y=u+t+r+p+m; printf("%4d",y); } // xét lần lượt từng chữ số if(u%2==0&&t%2!=0&&r%2!=0&&p%2!=0&&m%2!=0) printf("%4d",u); if(u%2!=0&&t%2==0&&r%2!=0&&p%2!=0&&m%2!=0) printf("%4d",t); if(u%2!=0&&t%2!=0&&r%2==0&&p%2!=0&&m%2!=0) printf("%4d",r); if(u%2!=0&&t%2!=0&&r%2!=0&&p%2==0&&m%2!=0) printf("%4d",p); if(u%2!=0&&t%2!=0&&r%2!=0&&p%2!=0&&m%2==0) printf("%4d",m); // xét lần lượt 2 chữ số if(u%2==0&&t%2==0&&r%2!=0&&p%2!=0&&m%2!=0) { int no=u+t; printf("%4d",no); } if(u%2==0&&t%2!=0&&r%2==0&&p%2!=0&&m%2!=0) { int op=u+r; printf("%4d",op); } if(u%2==0&&t%2!=0&&r%2!=0&&p%2==0&&m%2!=0) { int pq=u+p; printf("%4d",pq); } if(u%2==0&&t%2!=0&&r%2!=0&&p%2!=0&&m%2==0) { int qr=u+m; printf("%4d",qr); } if(u%2!=0&&t%2==0&&r%2==0&&p%2!=0&&m%2!=0) { int rs=t+r; printf("%4d",rs); } if(u%2!=0&&t%2==0&&r%2!=0&&p%2==0&&m%2!=0) { int st=t+p; printf("%4d",st); } if(u%2!=0&&t%2==0&&r%2!=0&&p%2!=0&&m%2==0) { int tu=t+m; printf("%4d",tu); } if(u%2!=0&&t%2!=0&&r%2==0&&p%2==0&&m%2!=0) { int uv=r+p; printf("%4d",uv); } if(u%2!=0&&t%2!=0&&r%2==0&&p%2!=0&&m%2==0) { int vw=r+m; printf("%4d",vw); } if(u%2!=0&&t%2!=0&&r%2!=0&&p%2==0&&m%2==0) { int wx=p+m; printf("%4d",wx); } // xét lần lượt 3 chữ số if(u%2==0&&t%2==0&&r%2==0&&p%2!=0&&m%2!=0) { int xy=u+t+r; printf("%4d",xy); } if(u%2==0&&t%2==0&&r%2!=0&&p%2==0&&m%2!=0) { int yz=u+t+p; printf("%4d",yz); } if(u%2==0&&t%2==0&&r%2!=0&&p%2!=0&&m%2==0) { int abc=u+t+m; printf("%4d",abc); } if(u%2==0&&t%2!=0&&r%2==0&&p%2==0&&m%2!=0) { int bcd=u+r+p; printf("%4d",bcd); } if(u%2==0&&t%2!=0&&r%2==0&&p%2!=0&&m%2==0) { int cde=u+r+m; printf("%4d",cde); } if(u%2==0&&t%2!=0&&r%2!=0&&p%2==0&&m%2==0) { int def=u+p+m; printf("%4d",def); } if(u%2!=0&&t%2==0&&r%2==0&&p%2==0&&m%2!=0) { int efg=t+r+p; printf("%4d",efg); } if(u%2!=0&&t%2==0&&r%2==0&&p%2!=0&&m%2==0) { int fgh=t+r+m; printf("%4d",fgh); } if(u%2!=0&&t%2!=0&&r%2==0&&p%2==0&&m%2==0) { int ghi=r+p+m; printf("%4d",ghi); } // xét lần lượt 4 chữ số if(u%2==0&&t%2==0&&r%2==0&&p%2==0&&m%2!=0) { int hij=u+t+r+p; printf("%4d",hij); } if(u%2==0&&t%2==0&&r%2==0&&p%2!=0&&m%2==0) { int ijk=u+t+r+m; printf("%4d",ijk); } if(u%2==0&&t%2==0&&r%2!=0&&p%2==0&&m%2==0) { int jkl=u+t+p+m; printf("%4d",jkl); } if(u%2!=0&&t%2==0&&r%2==0&&p%2==0&&m%2==0) { int klm=t+r+p+m; printf("%4d",klm); } if(u%2==0&&t%2!=0&&r%2==0&&p%2==0&&m%2==0) { int lmn=u+r+p+m; printf("%4d",lmn); } } } void main() { int n,tieptuc; quaylai:demchuso(n); lietkechuso(n); tongcacchusochan(n); printf("\nBan co muon tiep tuc chay chuong trinh khong ? Neu co bam phim C,nguoc lai bam bat ky 1 phim nao khac de ket thuc\n"); tieptuc=getch(); if(tieptuc=='c'||tieptuc=='C') goto quaylai; }