c读程序(精心整理).doc

阅读程序写结果试题第四章 选择结构 （共20道题）1. （于蕾）#include <stdio.h>void main( ) int x,y,t;x=7;y=9;if(x<y) t=x;x=y;y=t;printf("%d,%dn" , x,y );运行结果：9,72. （于蕾）#include <stdio.h>void main( ) int x=1,a=2,b=3; switch(x) case 1: a-; break; case 2: b+; break; case 3: a+;b+; printf("na=%d,b=%dn",a,b);运行结果：a=1,b=33. （于蕾）#include <stdio.h>void main( ) char ch1 = 'E' if(ch1 >= 'A') ch1+; else ch1+=32; printf("ch1 = %cn", ch1);运行结果：ch1= F 4. （于蕾）#include <stdio.h>void main( ) int x,y,t;x=5;y=3;if(x>y) t=x;x=y;y=t;printf("%d,%dn" , x,y );运行结果：3,55. （王伟）#include <stdio.h>int main()int a,b,c,m;printf("Enter three integers:");scanf("%d%d%d",&a,&b,&c);if(a<=b)m=a;elsem=b;if(c<m)m=c;printf("m=%dn",m);return 0;输入：21 22 23<回车>运行结果：m=216. （王伟）#include <stdio.h>int main()char ch1='a',ch2='B',ch3='E'if(ch1>ch2)if(ch2>ch3)ch3+;else-ch3;printf("ch3=%cn",ch3);return 0;运行结果：ch3=D7. （王伟）#include <stdio.h>int main()float x,y;scanf("%f",&x);switch(int)x/10)case 0: y=1.0;printf("y=%fn",y);break;case 1: y=2*x+1;printf("y=%fn",y);break;case 2: y=3*x*x+2;printf("y=%fn",y);break;default:printf("No definition.n"); return 0;输入：15.3<回车>运行结果：y=31.6000008. （王伟）#include <stdio.h>int main()char ch1='A',ch2='B'switch(ch1)case 'A':switch(ch2)case 'B': printf("Good!n");break;case 'A': printf("Better!n");break;case 'B': printf("Best!n"); break;return 0;运行结果：Good!Best!9 （王锋）#include <stdio.h>void main() float score;score = 100;if (score<60) printf("En"); else switch( ( int ) score / 10 ) case 10: case 9: printf("An"); case 8: printf("Bn"); case 7: printf("Cn"); break; case 6: printf("Dn"); break; default: printf("Errorn"); 运行结果：ABC10 （王锋）#include <stdio.h>void main()int i=0，a=2；if(i=0)printf(“*”)；elseprintf(“$”)；printf(“*”)；运行结果：*11. （王锋）#include<stdio.h> void main()int m=10,n=0,p=4,q=20;if (m) if (n) q=15-m;else q=25+m;else if (p) q=q+p;printf(“q=%dn”,q); 运行结果：q=3512. （王锋）#include<stdio.h>void main()int a=1,b=0;switch(a)case 1: switch (b)case 0: printf(“*0*”); break; case 1:printf(“*1*”);break;case 2: printf(“*2*”);break;运行结果：*0*2*13. （宋昕）#include<stdio.h>int main( ) int a=2,b=7,c=5; switch (a>0) case 1: switch (b<0) case 1: printf(""); break ; case 2: printf("!"); break ; case 0: switch (c=5) case 1: printf("*") ; break ; default : printf("#") ; break ; default : printf("&"); printf("n"); return 0;运行结果：*&14. （宋昕）#include<stdio.h>int main() int a=0,b=1,c=0,d=20; if(a) d=d-10; else if (!b) if(!c) d=15; else d=25; printf("d=%dn",d); return 0;运行结果：d=2015. （宋昕）#include<stdio.h>int main() int a=1; switch(a) case 0: printf("*0*");break; case 1:printf("*1*");break; case 2:printf("*2*");break; return 0;运行结果：*1*16. （宋昕）#include <stdio.h>int main() int x, y; scanf("%d",&x); y = x>12 ? x + 10 : x - 12; printf("%dn", y); return 0;输入：12<回车>运行结果：017. （宋昕）#include <stdio.h>int main() float x, y; char op; double r; scanf("%c%f%f",&op,&x,&y); switch(op) case '+': r = x + y; break; case '-': r = x - y; break; case '*': r = x * y; break; case '/': r = x / y; break; printf("%.1f", r); return 0;输入：3.5<回车>运行结果：0.618. （王勇超）#include "stdio.h"void main( ) int a=7; if(a>9 | a<10) a=a/3; else a=a%3; printf("a=%d", a);运行结果：a=219. （王勇超）#include<stdio.h>void main() int a=20; switch(a%3) case 0: printf("0"); case 1: printf("1"); case 2: printf("2"); default: printf("3"); printf("4");运行结果：23420. （王勇超）#include <stdio.h>void main()int a=2,b=5,c=8,t;if ( a < b ) t = a; a = b; b = t; if ( b < c ) t = b; b = c; c = t; if ( a < b ) t = a; a = b; b = t; printf( "%d,%dn", a+, -c );运行结果：8,1第五章 循环结构 共20道题1. （于蕾)#include <stdio.h>void main() int number , digit; number = 1234; while ( number != 0 ) digit = number%10 ;printf( "%d" , digit ) ;number = number / 10 ;运行结果：43212. （于蕾)#include <stdio.h>#define N 5void main( )int i; for(i=1;i<N;i+) printf("%dn",i*i);运行结果：149163. （于蕾)#include<stdio.h>void main( ) int i,s,x; s=0; x=15; for(i=1;i<=5;i+) if (x%i=0)s= s + i; printf("i=%d,s=%dn",i,s);运行结果：i=6,s=94. （于蕾)#include <stdio.h>void main()int counter=1; while(counter <= 5) printf("%d n", counter ); counter+;运行结果：123455 （王伟）#include<stdio.h>int main()int i,sum,m,a;sum=0;m=5;for(i=0;i<=3;i+)scanf("%d",&a); if(a>m)sum+=a;printf("sum=%dn",sum);return 0;输入：2 10 8 3<回车>运行结果：sum=186. （王伟）#include<stdio.h>int main()int i,j,k;for(i=1;i<=4;i+)for (j=1;j<5-i;j+)printf(" ");for(k=1;k<=i;k+)printf("*");printf("n");return 0;运行结果： * * *7. （王伟）#include <stdio.h>int main()int i,j;i=1;while(i<5)for(j=1;j<2*i+1;j+)printf("%c",'#');printf("n");i+;return 0;运行结果：#8. （王伟）#include <stdio.h>int main()int i=10,m=0,n=0;doif(i%2!=0)m=m+i;elsen=n+i;i-;while(i>=0);printf("m=%d,n=%dn",m,n);return 0;运行结果：m=25,n=309 （王锋）#include <stdio.h>void main() int sum=0,n; scanf("%d",&n); while(n<=5) sum+=n; n+;printf("sum=%d",sum);输入：1<回车>运行结果：sum=1510 （王锋）#include <stdio.h>void main()int i, j;for(i=2;i>=0;i-)for(j=1;j<=i;j+)printf("*");for(j=0;j<=2-i;j+)printf("!");printf("n");运行结果：*!*!11 （王锋）#include <stdio.h>void main()int a,b;for(a=1,b=1;a<=100;a+)if(b>20) break;if(b%4=1)b=b+4;continue;b=b-5;printf("a=%dn",a);运行结果：a=612 （王锋）#include <stdio.h>void main( )char k; int i; for(i=1;i<3;i+) scanf("%c",&k); switch(k) case '0': printf("anothern");case '1': printf("numbern");输入：01<回车>运行结果：anothernumbernumber13. （宋昕）#include <stdio.h>int main() int i, s = 0; for(i = 1; i < 10; i+) s += i * i; if(s > 10) break; printf("i=%d, s=%dn", i, s);return 0; 运行结果：i=3, s=14 14. （宋昕）#include <stdio.h>void main()char ch;while(ch=getchar()!='n') if (ch>='A'&&ch<='Z')ch=ch+32;else if (ch>='a'&&ch<='z')ch=ch-32;printf("%c",ch);输入：ABCdef<回车>运行结果：abcDEF15. （宋昕）#include <stdio.h>int main () int a, b; for (a = 1, b = 1 ; a <= 100 ; a+) if (b >= 9) break; if (b % 3 = 1) b += 3 ; continue ; b -= 5; printf("%d,%dn", a, b); return 0;运行结果：4,1016. （宋昕）#include<stdio.h>int main () int i = 0,j = 0; while (i < 10) i+; while (j+ < 10) ; printf("i=%d,j=%dn",i,j);return 0;运行结果：i=10,j=1117. （王勇超）#include "stdio.h"void main( ) int i,j,t; for(i=1,j=10;i<3;i+,j-) t=i+j; t+;printf("%d,%d",j,t);运行结果：8,1218. 王勇超）#include "stdio.h"void main() int i=10,j; do j = i%2;printf( "%d",j );i-; while ( i> 4 ); 运行结果：01010119 （王勇超）#include "stdio.h"void main() int i=7,j; while ( i> 2) j = i%2;printf( "%d",j );i-; printf( "%d",i ); 运行结果：10101220. （王勇超）#include <stdio.h>void main()int i,j,t=0;for(i=3;i>0;i-)for(j=0;j<4;j+)t+=j;printf("t=%d",t);运行结果：t=18第六章 函数 共40道题1. （王伟）#include <stdio.h>long fun(int x,int n);int main()int x=3,n=3;long p;p=fun(x,n);printf("p=%ldn",p);return 0;long fun(int x,int n)int i;long p=1; for(i=0;i<n;i+)p*=x; return p;运行结果：p=272. （王伟）#include <stdio.h>int isDigit(char ch);int main()char ch;while(ch=getchar()!='n')if(isDigit(ch)putchar(ch);printf("n");return 0;int isDigit(char ch)if(ch>='0' && ch<='9')return 1;elsereturn 0;输入：Abc1d23eF45g<回车>运行结果：123453. （王伟）#include <stdio.h>void odddivisor(int n);int main()int n;scanf("%d",&n);odddivisor(n);return 0;void odddivisor(int n)int i;for(i=3;i<=n/2;i=i+2)if(n%i=0)printf("%5d",i);printf("n");输入：15<回车>运行结果： 3 54. （王伟）#include <stdio.h> void print();int a=5;int main()int a=1,b=2;a=a+b;print();printf("%d %dn",a,b);return 0;void print()int b=3;printf("%d %dn",a,b);运行结果：5 33 25. （王伟）#include <stdio.h> int fun1(int x);void fun2(int x);int main()int x=1;x=fun1(x);printf("%dn",x);return 0;int fun1(int x)x+;fun2(x);return x;void fun2(int x)x+;运行结果：26. （王伟）#include <stdio.h> int fun1(int a,int b,int c);int main()int a=11,b=21,c=31;fun1(a,b,c);printf("%d %d %dn",a,b,c);return 0;int fun1(int a,int b,int c)a=a+10;b=b+10;c=c+10;return c;运行结果：11 21 317. （王伟）#include<stdio.h>void fun(int x);int main()fun(7);printf("n");return 0;void fun(int x)if(x/2>1)fun(x/2);printf("%5d",x);运行结果： 3 78. （王伟）#include <stdio.h> void fun(int a);int main()int i,a5=1,2,3;fun(a);for(i=0;i<5;i+)printf("%5d",ai);printf("n");return 0;void fun(int a)int i;for(i=0;i<5;i+)ai+=5;运行结果： 6 7 8 5 59.（于蕾）#include <stdio.h>void fun ( int k ) ;void main ( ) int w = 5 ; fun ( w ) ; printf ( "n" ) ;void fun ( int k ) if ( k>0 ) fun ( k-1 ) ; printf ( "%d" , k ) ;运行结果：01234510. （于蕾）#include<stdio.h>void f1(void);int a=1;void main( )int a=2;f1();int a=3;printf("a2=%dn",a);printf("a3=%dn",a);void f1(void)printf("a1=%dn",a);运行结果：a1=1a2=3a3=211. （于蕾）#include<stdio.h>void f(int a, int b, int *c)a=20; b=10; *c=a+b; void main()int a=10,b=20,c=30,d=40; f(a,b,&c); printf("%d,%d,%dn",a,b,c);运行结果：10,20,3012. （于蕾）#include<stdio.h>void swap(int a,int b);void main()int a=2,b=3;printf("a=%d,b=%dn",a,b);swap(a,b);printf("a=%d,b=%dn",a,b);void swap(int a,int b)int c;c=a;a=b;b=c;运行结果：a=2,b=3a=2,b=313. （于蕾）#include <stdio.h>void fun(int a,int b,int c);void main()int x=10,y=20,z=30; fun(x,y,z);printf("%d,%d,%dn",x,y,z);void fun(int a,int b,int c)a=456;b=567;c=678;运行结果：10,20,3014. （于蕾）#include <stdio.h>float f(int n) int i;float s=0.0; for(i=1;i<n;i+) s=s+(float)1.0/i; return s;void main()int i;float a=0.0; for(i=1;i<3;i+) a=a+f(i); printf("a=%.4fn", a);运行结果：a=1.000015. （于蕾）#include <stdio.h>int f(int a);void main()int a=2,i;for(i=0;i<3;i+)printf("%d",f(i);int f(int a)int b=0,c=3;b+;c+;return(a+b+c);运行结果：56716. （于蕾）#include<stdio.h>int fun();void main() int i,x; for(i=0;i<=2;i+) x=fun(); printf("%dn",x); int fun()int x=3;x+;return x;运行结果：417. （王锋）#include <stdio.h>float add(float x,float y); void main( ) float a,b,c; a=1.0; b=2.0; c=add(a,b); printf("%fn",c);float add(float x,float y)float z;z=x+y;return(z); 运行结果：3.00000018. （王锋）#include<stdio.h>void fun(int x, int cp, int dp) cp=x+; dp=+x; void main(void) int a,c=80, d=-20;a=30; fun(a,c,d);printf("%d,%dn", c,d);运行结果：80,-2019. （王锋）#include <stdio.h>int f(int a,int b);void main()int i=2,p;p=f(i,i+1);printf("%dn",p);int f(int a,int b)int c;if(a>b)c=1;else if (a=b)c=0;else c=-1;return (c);运行结果：-120. （王锋）#include <stdio.h>int fun(int n)if(n= =1) return 1;else return fun(n-1)+3;void main()int i,j=0;for(i=1;i<4;i+)j=j+fun(i);printf("j=%dn",j);运行结果：j=1221. （王锋）#include <stdio.h>void f(int x,int y)int t;if(x<y)t=x;x=y;y=t;void main()int a=4,b=3,c=5; f(a,b); f(a,c); f(b,c);printf("%d,%d,%d",a,b,c);运行结果：4,3,522. （王锋）#include<stdio.h>int age(int n)int c; if(n=1) c=10;else c=age(n-1)+2;return(c);void main()printf("%d",age(5);运行结果：1823. （王锋）#include <stdio.h>void hello_world(void)printf("Hello, world!n");void three_hellos(void)int counter;for (counter =1;counter <= 3;counter+)hello_world();void main(void)three_hellos();运行结果：Hello, world!Hello, world!Hello, world!24. （王锋）#include <stdio.h>int f(int a,int b); void main() int x,i=1,k=3; x=f(i,k); printf("x=%d n",x); int f(int a,int b) int M=0; while(b!=0) M=M+a; b-; return M; 运行结果：x=3;25. （宋昕）#include<stdio.h>f(int b ,int m,int n) int i,s = 0; for(i = m;i < n;i+) s += bi; return s;