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1、阅读程序写结果试题第四章 选择结构 （共20道题）1. （于蕾）#include void main( ) int x,y,t;x=7;y=9;if(xy) t=x;x=y;y=t;printf(%d,%dn , x,y );运行结果：9,72. （于蕾）#include 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 void main( ) char
2、ch1 = E; if(ch1 = A) ch1+; else ch1+=32; printf(ch1 = %cn, ch1);运行结果：ch1= F 4. （于蕾）#include void main( ) int x,y,t;x=5;y=3;if(xy) t=x;x=y;y=t;printf(%d,%dn , x,y );运行结果：3,55. （王伟）#include 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(cm)m=c;printf(m
3、=%dn,m);return 0;输入：21 22 23运行结果：m=216. （王伟）#include int main()char ch1=a,ch2=B,ch3=E;if(ch1ch2)if(ch2ch3)ch3+;else-ch3;printf(ch3=%cn,ch3);return 0;运行结果：ch3=D7. （王伟）#include 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;ca
4、se 2: y=3*x*x+2;printf(y=%fn,y);break;default:printf(No definition.n); return 0;输入：15.3运行结果：y=31.6000008. （王伟）#include 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）#incl
5、ude void main() float score;score = 100;if (score60) 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 void main()int i=0，a=2；if(i=0)printf(“*”)；elsepri
6、ntf(“$”)；printf(“*”)；运行结果：*11. （王锋）#include 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）#includevoid 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*”)
7、;break;运行结果：*0*2*13. （宋昕）#includeint main( ) int a=2,b=7,c=5; switch (a0) case 1: switch (b0) 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）#includeint main()
8、 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）#includeint 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 int main() int x, y; scanf(%d,&x
9、); y = x12 ? x + 10 : x - 12; printf(%dn, y); return 0;输入：12运行结果：017. （宋昕）#include 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运行结
10、果：0.618. （王勇超）#include stdio.hvoid main( ) int a=7; if(a9 | a10) a=a/3; else a=a%3; printf(a=%d, a);运行结果：a=219. （王勇超）#includevoid 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 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 void main() int number , digit; number = 1234; while ( number
