#include<stdio.h> #define M 60 //一小时等于60分钟 int main(void) { int hour; //小时格式 int min; //分钟格式 int a; //小时分钟格式中的分钟 printf("Please enter a time(min):"); scanf("%d", &min); while(min>0) { hour = min / M; //小时 a = min % M; //分钟 printf("%d min is %d hour %d min.\n", min, hour, a); printf("Do you want to exit, enter a time(time<=0).\n"); scanf("%d", &min); } printf("Done!\n"); return 0; }
2.
//打印包括输入数在内的比输入数大10的所有整数 #include<stdio.h> int main(void) { int a; //用户输入数 int i = 0; //计数器 printf("Enter a number(int):"); scanf("%d", &a); printf("%d", a); //原数 while(++i<=10) //打印10次 { a++; printf(" %d", a); //各数间空一格 } printf("\n"); //最后一个数打印之后换行 return 0; }
3.
//将天数以"XX周XX天"的格式显示 #include<stdio.h> #define M 7 //一周=7天 int main(void) { int day; int week; int left; printf("Enter a day number:"); scanf("%d", &day); while(day>0) { week = day / M; //周 left = day % M; //天 printf("%d is %d week, %d day.\n", day, week, left); printf("you can continue(enter 0 to quit):"); scanf("%d", &day); } printf("Done!\n"); return 0; }
4.
//将XX厘米用"XX英寸XX英尺"的格式显示 #include<stdio.h> #define M 30.48 //一英尺=30.48厘米 #define N 2.54 //一英寸=2.54厘米 int main(void) { float cm; int feet; //利用int型进行截断 float inch; float left; //阶段部分转换成英寸 printf("Enter your height in centimeters:"); scanf("%f", &cm); while(cm>0) { feet = cm / M; left = cm - (feet * M); inch = left / N; printf("%.1f cm = %d feet, %.1f inchs\n", cm, feet, inch); printf("Enter your height in cmtimeters(<=0 to quit):"); scanf("%f", &cm); } printf("Done!\n"); return 0; }
5.
#include <stdio.h> int main(void) { int count, sum; int i; count = 0; sum = 0; printf("Enter the number of your workdays:"); scanf("%d", &i); while(count++<i) { sum = sum + count; } printf("sum = %d\n", sum); return 0; }
6.
//计算整数的平方 #include<stdio.h> int main(void) { int m; int n; int i; m = 0; n = 0; printf("Enter a number:"); scanf("%d", &i); while(m++<i) { n = m * m; printf("%d:\t%d\n", m, n); } return 0; }
7.
//设计一个计算并打印浮点数立方值的函数 #include<stdio.h> void three(double n); //函数原型 int main(void) { double m; printf("Enter a number(double):"); scanf("%lf", &m); //lf(小写)转换说明表明读入double类型的值,Lf则是long double类型! three(m); //函数调用(实参) return 0; } void three(double n) //形参 { printf("%.2lf:\t%.2lf\n", n, n*n*n); }
8.
//求模运算 #include<stdio.h> int main(void) { const int b; //运算对象2 int a; //运算对象1 printf("This program computes moduli.\n"); printf("Enter a integer to serve as the second operand:"); scanf("%d", &b); printf("Enter the first operand:"); scanf("%d", &a); printf("%d %% %d is %d\n", a, b, a%b); while(a>0) { printf("Enter next number for first operand(<=0 to quit):"); scanf("%d", &a); printf("%d %% %d is %d\n", a, b ,a%b); printf("Enter next number for first operand(<=0 to quit):"); scanf("%d", &a); } printf("Done!\n"); return 0; }
9.
//华氏温度转摄氏温度和开氏温度 #include<stdio.h> void Temperatures(double x); //函数原型 int main(void) { double m; //华氏温度值 printf("输入一个华氏温度值:"); while(scanf("%lf", &m)==1) //scanf()函数返回读取数据的数量,若读取数字则返回1,读取字符则不返回1 { Temperatures(m); printf("输入一个华氏温度:"); scanf("%lf", &m); } printf("Done!\n"); return 0; } //函数功能:将华氏温度转换为摄氏温度和开氏温度并打印三个值 void Temperatures(double x) { const double a = 5.0; const double b = 9.0; const double c = 32.0; const double d = 273.16; double n; //摄氏温度 double k; //开氏温度 n = a / b * (x - c); //计算摄氏温度 k = n + d; //计算开氏温度 printf("华氏温度\t摄氏温度\t开氏温度\n"); printf("%-15.2lf\t%-15.2lf\t%-15.2lf\n", x, n, k); }