第四章:分支程序设计05
让编程改变世界
Change the world by program
switch语句
练习1:输入三个整数,输出最大数和最小数。
答案与解析:[codesyntax lang="c"]#include <stdio.h>void main(){int a,b,c,max,min;printf("input three numbers: ");scanf("%d%d%d",&a,&b,&c);if( a > b ){max = a;min = b;}else{max = b;min = a;}if( max < c )max=c;else if( min > c )min=c;printf("max=%dnmin=%d",max,min);}
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练习2:计算器程序。用户输入运算数和四则运算符,输出计算结果。
答案与解析:[codesyntax lang="c"]#include <stdio.h>void main(){float a,b;char c;printf("input expression: a+(-,*,/)b n");scanf("%f%c%f",&a,&c,&b);switch(c){case '+': printf("%fn",a+b);break;case '-': printf("%fn",a-b);break;case '*': printf("%fn",a*b);break;case '/': printf("%fn",a/b);break;default: printf("input errorn");}}
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