C语言综合练习题

for(i=0;i

printf(\

if((i+1)%5==0) printf(\ }

k=find(a,N);

if(k==0) printf(\ else printf(\ wwjt(); }

void wwjt() {

FILE *IN,*OUT; int n; int i[5]; int o;

IN=fopen(\ if(IN==NULL) {

printf(\ }

OUT=fopen(\ if(OUT==NULL) {

printf(\ }

for(n=0;n<5;n++) {

fscanf(IN,\ }

o=find(i,5);

fprintf(OUT,\ fclose(IN); fclose(OUT); }

4、题目:分别统计字符串中字母、数字、空格和其他字符出现的次数(字符长度小于80)。

#include void wwjt();

int a=0,num=0,b=0,other=0; /*全局变量a用于保存字母个数,num用于保存数字个数,

b用于保存空格个数,other用于保存其他字符字数*/

void count(char c[]) {

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/**********Program**********/ int i;

for(i=0;c[i]!='\\0';i++)

if((c[i]>='A'&&c[i]<='Z')||(c[i]>='a'&&c[i]<='z')) a=a+1; else if(c[i]>='0'&&c[i]<='9') num=num+1; else if (c[i]==' ') b=b+1;

else other=other+1;

/********** End **********/ }

void main() {

char ch[80];

printf (\ gets(ch); count(ch);

printf (\ wwjt(); }

void wwjt() {

FILE *IN,*OUT; int i;

char sin[80];

IN=fopen(\ if(IN==NULL) {

printf(\erify The Currernt Dir..it May Be Changed\ }

OUT=fopen(\ if(OUT==NULL) {

printf(\erify The Current Dir.. it May Be Changed\ }

for(i=0;i<5;i++) {

a=0; num=0; b=0;

other=0;

fscanf(IN,\ count(sin);

fprintf(OUT,\ fprintf(OUT,\ fprintf(OUT,\

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fprintf(OUT,\ }

fclose(IN); fclose(OUT); }

5、功能:求给定正整数n以内的素数之积。(n<28)

#include #include\void wwjt(); long fun(int n) {

/**********Program**********/ long i,k;

long s=1;

for(i=2;i<=n;i++) { for(k=2;k

if(i%k==0) break; if(k==i) s=s*i; }

return s;

/********** End **********/ }

main() {

int m;

printf(\ scanf(\

printf(\ wwjt(); }

void wwjt() {

FILE *IN,*OUT; int c ; int t; long o;

IN=fopen(\ if(IN==NULL) {

printf(\ }

OUT=fopen(\ if(OUT==NULL)

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{

printf(\ }

for(c=1;c<=5;c++) {

fscanf(IN,\ o=fun(t);

fprintf(OUT,\ }

fclose(IN); fclose(OUT); }

--The End--

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