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1、C语言程序习题答案例1.1：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){printf("ThisisaCprogram.");return0;}例1.2：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){chara,b,sum;a=123;b=456;sum=a+b;printf("sumis%c",sum);return0;}例1.3：/*Note:YourchoiceisCIDE*/#include"stdio.h"//主函数intmain(){intm
2、ax(intx,inty);inta,b,c;scanf("max=%d,%d",&a,&b);c=max(a,b);printf("max=%d",c);return0;}//求两个整数中的较大者的max函数intmax(intx,inty);{intz;if(x>y)z=x;elsez=y;return(Z);}例3.1：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){floatf,c;f=64.0;c=(5.0/9)*(f-32);printf("f%fc%f",f,c);return0;}例3.2：/*N
3、ote:YourchoiceisCIDE*/#include"stdio.h"voidmain(){floatp0=1000,r1=0.0036,r2=0.0225,r3=0.0198,p1,p2,p3;p1=p0*(1+r1);p2=p0*(1+r2);p3=p0*(1+r3/2)*(1+r3/2);printf("p1=%fp2=%fp3=%f",p1,p2,p3);return0;}例3.3：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){charc1,c2;c1='A';c2=c1+32;printf("
4、%c",c2);printf("%d",c2);return0;}例3.4：/*Note:YourchoiceisCIDE*/#include"stdio.h"#include"math.h"voidmain(){doublea,b,c,s,area;a=3.67;b=5.43;c=6.21;s=(a+b+c)/2;area=sqrt(s*(s-a)*(s-b)*(s-c));printf("a=%ftb=%ftc=%f",a,b,c);printf("area=%f",area);return0;}例3.5：/*Note:YourchoiceisCIDE*/#
5、include"stdio.h"#include"math.h"voidmain(){doublea,b,c,disc,x1,x2,p,q;scanf("%lf%lf%lf",&a,&b,&c);disc=b*b-4*a*c;p=-b/(2.0*a);q=sqrt(disc)/(2.0*a);x1=p+q;x2=p-q;printf("x1=%7.2fx2=%7.2f",x1,x2);return0;}例3.6：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){doublea=1.0;printf("%10.15f
6、",a/3);return0;}例3.7:/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){floata;a=10000/3.0;printf("%f",a);return0;}例3.8：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){chara='B',b='O',c='Y';putchar(a);putchar(b);putchar(c);putchar("");return;}例3.9：/*Note:YourchoiceisCIDE*/#include"s
7、tdio.h"voidmain(){chara,b,c;a=getchar();b=getchar();c=getchar();putchar(a);putchar(b);putchar(c);putchar("");return0；}例3.10：/*Note:YourchoiceisCIDE*/#include"stdio.h"voidmain(){charc1,c2;c1=getchar();c2=c1+32;putchar(c2);return0;}例4.1
