1、C語言程序設(shè)計(jì)(第三版)黃保和江弋主編第一到四章編程題答案2.1#include#includevoidmain()printf(%gn,fabs(-6)+16.3*5.4);2.2#include#includemain()inta,b;printf(Inputa,b:n);scanf(%d%d,&a,&b);if(ab)printf(%gn,sqrt(a);elseprintf(%gn,sqrt(b);2.3#includemain()floata;printf(Inputa:n);scanf(%g,&a);printf(thesquareofa=%gtacubed=%gn,a*a,a*a

2、*a);2.4#includemain()floata,b,c,d,sum;printf(Inputa,b,c,d:n);scanf(%f%f%f%f,&a,&b,&c,&d);sum=a+b+c+d;printf(%fn,sum/4);2.5#includemain()intn,a,b,c,d,e,s;printf(請(qǐng)輸入一個(gè)五位數(shù)：n);scanf(%d,&n);a=n%10;b=n/10%10;c=n/100%10;d=n/1000%10;e=n/10000;s=a+b+c+d+e;printf(%dn,s);3.2#includemain()floatr,C,S;printf(Inpu

3、tr:n);scanf(%f,&r);C=2*3.14159*r;S=3.141459*r*r;printf(C=%.2ftS=%.2fn,C,S);3.3#includemain()floatf,c;printf(請(qǐng)輸入華氏溫度：n);scanf(%f,&f);c=5.0/9*(f-32);printf(攝氏溫度為=%.2fn,c);3.4#include#includemain()floata,b,c,S,p;printf(輸入三角形的三條邊長(zhǎng)：);scanf(%f%f%f,&a,&b,&c);if(a+bc&b+ca&c+ab)p=(a+b+c)/2;S=sqrt(p*(p-a)*(p-

4、b)*(p-c);printf(S=%f,S);elseprintf(該三角形不存在n);3.5#includemain()printf(AAaBBn);printf(AAbBBn);printf(AAnBBn);printf(AArBBn);printf(AAtBBn);printf(AAvBBn);printf(AABBn);printf(AABBn);printf(AABBn);printf(AA?BBn);3.6#includemain()charzimu;printf(請(qǐng)輸入小寫英文字母:);scanf(%c,&zimu);zimu=zimu-32;printf(%cn,zimu);

5、3.7#includemain()chara,b,c;printf(請(qǐng)輸入兩個(gè)字符:n);scanf(%ct%c,&a,&b);c=a;a=b;b=c;printf(%ct%cn,a,b);3.8#include#includemain()floatrate=3.25,capital,n,deposit;printf(請(qǐng)輸入存款本金:);scanf(%f,&capital);printf(請(qǐng)輸入存款期:);scanf(%f,&n);deposit=capital+capital*rate/100*n;printf(%lfn,deposit);3.9#include#includemain():

6、n);floata,b,c=9;printf(請(qǐng)輸入該銷售員的銷售額scanf(%f,&a);b=1000+a*c/100;printf(%fn,b);4.1#includemain()inta;printf(請(qǐng)輸入一個(gè)整數(shù):n);scanf(%d,&a);if(a%2=0)printf(%d為偶數(shù)n,a);elseprintf(%d為奇數(shù)n,a);4.2#includemain()charc;printf(請(qǐng)輸入一個(gè)字符:n);scanf(%c,&c);if(c=A&c=Z)c=c+32;printf(%cn,c);elseprintf(%cn,c);4.3#includemain()flo

7、ata;printf(請(qǐng)輸入一個(gè)考試分?jǐn)?shù):);scanf(%f,&a);if(a100)printf(數(shù)據(jù)錯(cuò)誤n);elseif(a60)printf(不及格n);elseif(a90)printf(合格n);elseprintf(優(yōu)秀n);4.4#includemain()floata,b;printf(輸入員工工作時(shí)間:n);scanf(%f,&a);if(a=0&a40)b=400+15*(a-40);printf(工資為:%fn,b);4.5#includemain()floata;printf(請(qǐng)輸入一個(gè)考試分?jǐn)?shù)：);scanf(%f,&a);if(a100)printf(數(shù)據(jù)錯(cuò)誤n);elseif(a60)printf(不及格n);elseif(a70)printf(及格n);elseif(a80)printf(中n);elseif(a90)printf(良n);elseprintf(