C编写的万年历程序，输入年份，输入要显示的格式，就会得到结果，用于练习循环语句的控制。

//万年历 #include "stdio.h" #include "math.h" struct month { int year; int mon; int pj; }; void print_cal(month m[],int a[],int n) { int mo=0,si=0,sj,i,j,bi,t,n_end[12],k=0,col,row,temp; temp=12/n; char c,q; for(row=0;row<temp;row++) { k=0; for(i=0;i<2;i++) { if(k==0) { for(j=0;j<n;j++) { printf("%10d %-10d",m[j+row*n].year,m[j+row*n].mon); } k=1; printf("\n"); } else { for(j=0;j<n;j++) { printf(" 日 一 二 三 四 五 六"); } printf("\n\n"); } } for(bi=0;bi<6;bi++) { if(bi==0) { for(mo=0+row*n;mo<n+row*n;mo++) { for(t=0;t<m[mo].pj;t++) { printf(" "); } k=1; for(j=m[mo].pj;j<7;j++) { printf("%3d",k++); } n_end[mo]=k-1; } printf("\n"); continue; } for(mo=0+row*n;mo<n+row*n;mo++) { k=n_end[mo]+1; for(t=0;t<7;t++) { if(k<=a[mo]) { printf("%3d",k++); } else { if(bi==5) { for(q=t;q<7;q++) { printf(" "); } break; } if(bi==4) { for(q=t;q<7;q++) { printf(" "); } break; } } } n_end[mo]=k-1; } printf("\n"); } } printf("enter 'q' to quit out !\n"); scanf("%s",&q); while(q!='q') { printf("error \n"); scanf("%s",&q); } } void pri_calendar(int yea) { month m[12]; int week_ex[28]={6,1,2,3,4,6,0,1,2,4,5,6,0,2,3,4,5,0,1,2,3,5,6,0,1,3,4,5}; int a[12]={31,28,31,30,31,30,31,31,30,31,30,31}; int abs_year; int i,j,n; bool leap_year; if(yea>=2000) { j=(yea-2000)%28; } else { j=28-(2000-yea)%28; } leap_year=(yea%4==0&&yea%100!=0||yea%400==0); if(leap_year) { a[1]=29; } j=week_ex[j]; for(i=0;i<12;i++) { m[i].year=yea; m[i].mon=i+1; m[i].pj=j; j=(j+a[i])%7; } printf("enter the format value(format value=1,2,3,4,6,12).\n"); scanf("%d",&n); if(12%n!=0) { printf("the format value is wrong,enter the format value again .\n"); scanf("%d",&n); } print_cal(m,a,n); } void main() { int yea; printf("enter the year :\n"); scanf("%d",&yea); pri_calendar(yea); }