不做
编写一个程序,要求提示输入一个ASCII码值(如,66),然后打印输入的字符。
# include
int main(){
int c;
printf("请输入字符的ASCII码:\n");
scanf("%d", &c);
printf("%c\n",c);
return 0;
}
编写一个程序,发出一声警报,然后打印下面的文本:
Startled by the sudden sound, Sally shouted,
"By the Great Pumpkin, what was that! "
# include
int main(){
printf("\aStartled by the sudden sound, Sally shouted,\n\"By the Great Pumpkin, what was that! \"\n");
return 0;
}
编写一个程序,读取一个浮点数,先打印小数点形式,再打印成指数形式。然后,如果系统支持,再打印成p计数法(即十六进制记数法)。按以下格式输出(实际显示的指数位数因系统而异):
Enter a floating-point value: 64.25
fixed-point notation: 64.250000
exponential notation: 6.425000e+01
p notation: 0x1.01p+6
# include
int main(){
float f;
printf("Enter a floating-point value:");
scanf("%f", &f);
printf("fixed-point notation: %f\n", f);
printf("exponential notation: %e\n", f);
printf("p notation: %a\n", f);
return 0;
}
一年大约有3.156 *10^7秒。编写一个程序,提示用户输入年龄,然后显示年龄对应的秒数。
# include
int main(){
int n;
printf("Enter a your year old:");
scanf("%d", &n);
printf("%d years = %f seconds\n", n, n*365*24*3600*3.156e7);
return 0;
}
1个水分子的质量约为3.0*10^-23克。一夸脱水大约是950克。编写一个程序,提示用户输入水的夸脱数,并显示水分子的数量。
# include
int main(){
float n;
printf("Enter the kua of water:");
scanf("%f", &n);
printf("%f kua = %f seconds\n", n, n*950/3e-23);
return 0;
}
1英寸相当于2.54厘米。编写一个程序,提示用户输入身高(英寸),然后以厘米为单位显示身高。
# include
int main(){
float n;
printf("Enter your height in inch: ");
scanf("%f", &n);
printf("%f in = %f cm\n", n, n*2.54);
return 0;
}
在美国的体积测量系统中,1品脱等于2杯,1杯等于8盎司,1盎司等于2大汤勺,1大唐莎等于3茶勺。编写一个程序,提示用户输入杯数,并以品脱、盎司、汤勺、茶勺为单位显示等价容量。思考对于该程序,为何使用浮点数类型比正式合适。
# include
int main(){
float n;
printf("Enter your cups: ");
scanf("%f", &n);
printf("%f cups = %f pin = %f ounce = %f big spoon = %f tea spoon \n", n, n/2, n*8,n*8*2,n*8*2*3);
return 0;
}