《C 语言程序设计》阅读程序写结果试题汇总(138 页)Good is good, but better carries it
精益求精，善益求善
阅读程序写结果试题第四章 选择结构 （共 20 道题）1
（于蕾）#include void main( ){ int x,y,t;x=7;y=9;if(x= 'A') ch1++; else ch1+=32; printf("ch1 = %c\n", ch1);}运行结果：ch1= F 4
（于蕾）#include void main( ){ int x,y,t;x=5;y=3;if(x>y){ t=x;x=y;y=t;}printf("%d,%d\n" , x,y );}运行结果：3,55
（王伟）#include int main(){int a,b,c,m;printf("Enter three integers:");scanf("%d%d%d",&a,&b,&c);if(ach3)ch3++;else--ch3;printf("ch3=%c\n",ch3);return 0;}运行结果：ch3=D7
（王伟）#include int main(){float x,y;scanf("%f",&x);switch((int)x/10){case 0: y=1
0;printf("y=%f\n",y);break;case 1: y=2*x+1;printf("y=%f\n",y);break;case 2: y=3*x*x+2;printf("y=%f\n",y);break;default:printf("No definition
\n"); }return 0;}输入：15
3运行结果：y=31
6000008
（王伟）#include int main(){char ch1=
