ex2

#include <stdio.h>
int main() {    
 int x=1234;
 int y=3, z=4;
 float f=123.456;
 double m=123.456;    
 char ch='a';    
 char a[]="Hello, world!";     

 printf("%d %d\n", y, z);    
 printf("y=%d, z=%d\n", y,z);    
 printf("%8d,%2d\n", x,x);    
 printf("%f, %8f, %8.1f, %0.2f, %.2e\n",f,f,f,f,f);    
 printf("%lf\n",m);    printf("%3c\n", ch);    
 printf("%s\n%15s\n%10.5s\n%2.5s\n%.3s\n",a,a,a,a,a);        

return 0;}

#include<stdio.h>
int main (){
    int num ;
    
    scanf("%d",&num);
    printf("2020%04d\n",num);
    
    scanf("%d",&num);
    printf("2020%04d\n",num);
    
    scanf("%d",&num);
    printf("2020%04d\n",num);
    
    return 0 ;
}

#include<stdio.h>
int main(){
int x=0;
int num;    
    while(x==0){
    
    scanf("%d",&num);
    printf("2020%04d\n",num);
    }
    
    return 0 ;
}

标签：int,scanf,04d,2020%,num,ex2,printf
来源： https://www.cnblogs.com/lddsbk/p/14602297.html