#include<stdio.h> int main() { printf("201983270470"); return 0; } #include<stdio.h> int main() { printf("Hello,Mars!"); return 0; } #include<stdio.h> int product (int,int ); int main (void) { int x,y,s; scanf("%d%d",&x,&y); s=product(x,y); printf("The mul is:%d",s); return 0; } int product(int a,int b) { int mul; mul=a*b; return mul; } #include<stdio.h> int main() { int x; printf("输入一个整数: \n"); scanf("%d",&x); if(x%2! = 0 ) the printf ( " odd " ); the else the printf ( " even number " ); return 0 ; } #include <stdio.h> int main () { int Days; the printf ( " Enter an integer: \ n- " ); Scanf ( " % D " , & Days); IF (Days> = . 1 && Days <= . 5 ) the printf ( " WorkDays, Fighting \ n- " ); else if(days>=6&&days<=7) printf("Ooops, not in 1~7\n"); return 0; } #include<stdio.h> int main() { char ch; printf("输入一个字符:\n"); scanf("%c",&ch); if(ch>='a'&&ch<='z') ch=ch-32; printf("%c\n",ch); return 0; } #include<stdio.h> int main() { int a=5,b=7,c=100,d,e,f; d=a/b*c; e=a*c/b; f=c/b*a; printf("d=%d,e=%d,f=%d\n",d,e,f); return 0; } #include<stdio.h> int main() { int a=5,b=8; printf("a++=%d\n",a++); printf("a=%d\n",a); printf("++b=%d\n",++b); printf("b=%d\n",b); return 0; } #include<stdio.h> int main() { int a=5,b=8,c=8; printf("%d,%d,%d,%d\n",a==b&&a==c,a!=b&&a!=c,a>=b&&a>=c,a<=b&&a<=c); printf("%d,%d\n",a<=b||a>=c,a==b||b==c); printf("%d,%d,%d,%d\n",!(a==b),!(a>=b),!(a>=c),!(a<=b)); return 0; }