程序

1、

#include<stdio.h>
int main(void)
{
    char ch;
    int i;
    float f1;


    f1=i=ch='C';
    printf("ch=%c,i=%d,f1=%2.2f\n",ch,i,f1);
    ch=ch+1;
    i=f1+2*ch;
    f1=2.0*ch+1;
    printf("ch=%c,i=%d,f1=%2.2f\n",ch,i,f1);
    ch=5212205.17;
    printf("Now ch=%c\n",ch);
    return 0;
}

2、

#include<stdio.h>
#define FORMAT "%s! C is cool!\n"
int main(void)
{
    int num=10;
    printf(FORMAT,FORMAT);
    printf("%d\n",++num);
    printf("%d\n",num++);
    printf("%d\n",num--);
    printf("%d\n",num);
    return 0;
}