C语言程序设计教程

}

习题4 1： 0 2： 20

3： (x<30&&x>20)||(x<-100) 4: ***a=25,b=14,c=16*** 5: 37 6: if(a<=b) printf(\ else printf(\ 7、

#include void main() { char a,b,t1,t2; scanf(\ t1=a>b?a:b; t2=a void main() { int temp1=0,temp2=0,x,y,i=1; printf(\ scanf(\ while((i*y)<=x) { if(x==(i*y)) {temp1=1;break;} temp2=i; i++; } if(temp1) printf(\ else printf(\shang=%d,yushu=%d\ getch(); } 9、

#include void main() { float x,y,m=0,n=0; scanf(\ n=(x-2)*(x-2);

m=(y-2)*(y-2); if((m+n)<=1) printf(\ else printf(\ getch(); } 10、

#include void main() { int temp=0,month,year; printf(\ scanf(\ if((year@0==0)||(year%4==0&&year0!=0)) temp=1; if(month==2) { if(temp)printf(\ else printf(\ } else if(month%2==0) printf(\ else printf(\ getch(); } 11、

switch(a/10) { case 5:m=4;break; case 4:m=3;break; case 3:m=2;break; case 2:m=1;break; default:m=5; } 12、

方法一：

#include void main() { int x,y; scanf(\ if(x<0&&x>-5) y=x-1; else if(x==0) y=x; else if(x>0&&x<8) y=x+1;

printf(\ getch(); }

方法二：

#include void main() { int x,y; scanf(\ if(x<8&&x>-5) { if(x==0)y=x; else if(x>0&&x<8) y=y=x+1; else y=x-1; printf(\ } else printf(\ getch(); }

方法三：

#include void main() { int x,y,i; scanf(\ if(x<8&&x>-5) { if(x==0)i=1; else if(x>0&&x<8) i=2; else i=3; } else i=4; switch(i) { case 1:y=x;printf(\ case 2:y=x+1;printf(\ case 3:y=x-1;printf(\ case 4:printf(\ }getch(); }

习题5

1、void main() { int n,value; int i,count=0; float average = 0; long int sum = 0; scanf(\ for(i = 0; i < n; i++)

{ scanf(\ if(value%2 == 0) { sum+=value; count++; } } average = sum / (float)count; printf(\ } 2、

#include \ void main() { char ch; int zm = 0, sz = 0; ch = getchar(); while(ch != '*') { if((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch < 'z') ) zm++; if(ch >= '0' && ch <= '9') sz++; ch = getchar(); } printf(\ } 3、

void main() { long i_value; int sum = 0; int temp = 0; scanf(\ if(i_value < 0) {printf(\error!\\n\ for(;;) { temp = i_value;