c答案(3)

main()

{int n,t,number=20; float a=2;b=1;s=0;

for(n=1;n<=number;n++) {s=s+a/b; t=a,a=a+b,b=t; }

printf(\} 5.9 main()

{float sn=100.0,hn=sn/2; int n;

for(n=2;n<=10;n++) {sn=sn+2*hn; hn=hn/2; }

printf(\ printf(\}

5.10 main()

{int day,x1,x2; day=9; x2=1;

while(day>0) {x1=(x2+1)*2; x2=x1; day--; }

printf(\}

5.11

＃i nclude\main()

{float a,xn0,xn1; scanf(\ xn0=a/2;

xn1=(xn0+a/xn0)/2; do

{xn0=xn1;

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xn1=(xn0+a/xn0)/2;

}

while(fabs(xn0-xn1)>=1e-5);

printf(\}

5.12

＃i nclude\main() {float x,x0,f,f1; x=1.5; do

{x0=x;

f=((2*x0-4)*x0+3)*x0-6; f1=(6*x0-8)*x0+3; x=x0-f/f1;

}

while(fabs(x-x0)>=1e-5); printf(\}

5.13

＃i nclude\main()

{float x0,x1,x2,fx0,fx1,fx2; do

{scanf(\ fx1=x1*((2*x1-4)*x1+3)-6; fx2=x2*((2*x2-4)*x2+3)-6; }

while(fx1*fx2>0); do

{x0=(x1+x2)/2;

fx0=x0*((2*x0-4)*x0+3)-6; if((fx0*fx1)<0) {x2=x0; fx2=fx0; } else {x1=x0; fx1=fx0; } }

while(fabs(fx0)>=1e-5);

12

printf(\} 5.14 main() {int i,j,k; for(i=0;i<=3;i++) {for(j=0;j<=2-i;j++) printf(\ for(k=0;k<=2*i;k++) printf(\ printf(\ }

for(i=0;i<=2;i++) {for(j=0;j<=i;j++) printf(\

for(k=0;k<=4-2*i;k++) printf(\ printf(\ } } 5.15 main() {char i,j,k;

for(i='x';i<='z';i++) for(j='x';j<='z';j++) {if(i!=j)

for(k='x';k<='z';k++) {if(i!=k&&j!=k)

{if(i!='x'&&k!='x'&&k!='z')

printf(\ } } } }

第六章 数组 6.1

＃i nclude #define N 101 main()

{ int i,j,line,a[N];

for (i=2;i

13

for (j=i+1;j

for (i=2,line=0;i

{ printf(\ line++; } if(line==10) { printf(\ line=0; } } } 6.2

#define N 10 main()

{int i,j,min,temp,a[N]; for(i=0;i

for(j=i+1;j

if(a[min]>a[j])min=j; temp=a[i]; a[i]=a[min]; a[min]=temp; }

for(i=0;i

main()

{float a[3][3],sum; int i,j;

for(i=0;i<3;i++) for(j=0;j<3;j++) {scanf(\ a[i][j]=sum; }

for(i=0;i<3;i++) sum=sum+a[i][i];

14

printf(\}

if(number>end) a[10]=numbe 6.4 main()

{int a[11]={1,4,6,9,13,16,19,28,40,100}; int temp1,temp2,number, end,i,j; scanf(\ end=a[9];

{for(i=0;i<10;i++) {if(a[i]>number) {temp1=a[i]; a[i]=number; for(j=i+1;j<11;j++) {temp2=a[j]; a[j]=temp1; temp1=temp2; } break; } } }

for(i=0;i<11;i++) printf(\}

6.5

#define N 5 main()

{int a[N]={8,6,5,4,1},i,temp; for(i=0;i

for(i=0;i

#define N 11 main()

{int i,j,a[N][N];

15