【正文】 amp。a,amp。b,amp。c)。} if(a+bflag=1。else flag=0。if(flag==1)printf(“nCan!”)。else printf(“nCan not!”)。} ，統(tǒng)計其中有多少個字母（包括大寫字母和小寫字母）。/* Note:Your choice is C IDE */ include “” define N 10 include “” include “” include “” main(){ char c[N]。int i,count=0。gets(c)。i=0。while(i!=strlen(c)){if(isupper(c[i])||islower(c[i]))count++。i++。}printf(“count=%4d”,count)。getch()。} ，判斷它是否是對稱串。如”abcdcba”是對稱串，”123456789”不是。/* Note:Your choice is C IDE */ include “” include “” include “” include “” define N 10 main(){ char a[N],b[N],i。printf(“Please input the string:n”)。gets(a)。if(strlen(a)N){printf(“Wrong input!Retry please!n”)。gets(a)。}strcpy(b,a)。strrev(a)。if(strcmp(a,b)==0)printf(“nYes!n”)。else printf(“nNo!n”)。}，然后統(tǒng)計其中共有多少個元音字符。（設(shè)N為200）/* Note:Your choice is C IDE */include “” include include define N 200 main(){int c[N],i,count=0。randomize()。for(i=0。ic[i]=random(27)+65。printf(“ %c”,c[i])。if(c[i]==39。A39。||c[i]==39。E39。||c[i]==39。I39。||c[i]==39。O39。||c[i]==39。U39。)count++。}printf(“nn”)。printf(“ncount=%4d”,count)。}找出三位自然數(shù)中的所有素數(shù)，要求判斷x素數(shù)用自定義函數(shù)data(x)實現(xiàn)。include “” int data(int x)。main(){ int i,flag=0。/*1是，0否*/ for(i=101。iint data(int x){ int i。for(i=2。iprintf(“nn”)。for(i=1。isatr(m)。printf(“n”)。} } void satr(int m){ int i。for(i=1。iprintf(“”)。} +bx+c=0有實根，則求之。include “”include “” main(){int a,b,c。float derta,x1,x2。printf(“Please input a,b,c:n”)。printf(“a=”)。scanf(“%d”,amp。a)。printf(“b=”)。scanf(“%d”,amp。b)。printf(“c=”)。scanf(“%d”,amp。c)。derta=b*b4*a*c。if(dertaprintf(“NO!n”)。if(derta==0){ printf(“One!n”)。x1=b/(2*a)。x2=x1。printf(“x=%”,x1)。}if(derta0){ printf(“Two!n”)。x1=(b+sqrt(derta))/(2*a)。x2=(bsqrt(derta))/(2*a)。printf(“x1=%,x2=%”,x1,x2)。} }，判斷它們是否相同。include “” include “” define N 20 main(){char c1[N],c2[N]。printf(“Please input two string below:n”)。gets(c1)。gets(c2)。printf(“n”)。printf(“The answer is:”)。if(strcmp(c1,c2)==0)printf(“Equal!n”)。else printf(“Not equal!n”)。} ，輸出其中較短的那個字串，并輸出它的長度。define N 20 include “” include “”main(){ char c1[N],c2[N]。printf(“Please input two string below:n”)。gets(c1)。gets(c2)。printf(“n”)。printf(“The answer is:”)。if(strlen(c1)==strlen(c2)){ puts(c1)。puts(c2)。printf(“The length is:%dn”,strlen(c1))。} if(strlen(c1)printf(“The length is:%dn”,strlen(c1))。}if(strlen(c1)strlen(c2)){puts(c2)。printf(“The length is:%dn”,strlen(c2))。} ，將短串連接于長串之后輸出。include “” include “” define N 20 main(){char c1[N],c2[N]。printf(“Please input two string below:n”)。gets(c1)。gets(c2)。while(strlen(c1)==strlen(c2)){ printf(“Wrong input!Retry please:n”)。gets(c1)。gets(c2)。}printf(“n”)。printf(“The answer is:”)。if(strlen(c1)if(strlen(c1)strlen(c2))puts(strcat(c1,c2))。}串，將長串連接于短串之后輸出 include “” include “” define N 20 main(){ char c1[N],c2[N]。printf(“Please input two string below:n”)。gets(c1)。gets(c2)。while(strlen(c1)==strlen(c2)){printf(“Wrong input!Retry please:n”)。gets(c1)。gets(c2)。}printf(“n”)。printf(“The answer is:”)。if(strlen(c1)puts(strcat(c1,c2))。if(strlen(c1)strlen(c2))puts(strcat(c2,c1))。}，降序排列后輸出。（設(shè)N為20）include “” include “” include “” define N 20 main(){ int a[N],i,j,temp。randomize()。for(i=0。ia[i]=random(900)+100。for(i=0。ifor(j=i+1。jif(a[j]a[i]){ temp=a[i]。a[i]=a[j]。a[j]=temp。} for(i=0。iprintf(“%4d”,a[i])。} ，輸出其中較長的那個字串，并輸出它的長度。define N 20 include “” include “” main(){ char c1[N],c2[N]。printf(“Please input two string below:n”)。gets(c1)。gets(c2)。printf(“n”)。printf(“The answer is:”)。if(strlen(c1)==strlen(c2)){ puts(c1)。puts(c2)。printf(“The length is:%dn”,strlen(c1))。} if(strlen(c2)printf(“The length is:%dn”,strlen(c1))。}if(strlen(c2)strlen(c1)){puts(c2)。printf(“The length is:%dn”,strlen(c2))。} } ，輸出平均身高，并找出哪些身高低于平均身高。include “” define N 11 main(){ float a[N],sum=0。int i。printf(“Please input heigths:n”)。for(i=0。iscanf(“%f”,amp。a[i])。sum+=a[i]。}a[N1]=sum/(N1)。printf(“The average is:%”,a[N1])。printf(“n”)。printf(“The answer are:n”)。for(i=0。iprintf(“%”,a[i])。}，輸出平均身高，并找出哪些身高高于平均身高。include “” define N 11 main(){ float a[N],sum=0。int i。printf(“Please input heigths:n”)。for(i=0。iscanf(“%f”,amp。a[i])。sum+=a[i]。}a[N1]=sum/(N1)。printf(“The average is:%”,a[N1])。printf(“n”)。printf(“The answer are:n”)。for(i=0。ia[N1])printf(“%”,a[i])。} ，輸出最高、最低的身高 include “” define N 10 main(){ float a[N],min=99999,max=99999。int i。printf(“Please input heigths:n”)。for(i=0。iscanf(“%f”,amp。a[i])。printf(“n”)。for(i=0。imax)max=a[i]。if(a[i]min=a[i]。} printf(“max=%,min=%”,max,min)。}。32.“百錢百雞”問題。百錢買百雞，雞翁一值錢三，雞母一值錢二，雞雛三值錢一，問雞翁、雞母、雞雛各幾何？ include “” main(){ int jw,jm,jc。/*公雞最多100/3=33只，母雞最多100/2=50只,小雞最多300只*/ for(jw=1。jwfor(jm=1。jmfor(jc=1。jcfor(a=1。afor(b=1。bfor(c=1。cif(a+2==bamp。amp。b+2==camp。amp。a+b+c==39)printf(“The ages are:%4d%4d%4d”,a,b,c)。}、w、h，求其體積及表面積。要求用自定義函數(shù)val(l,w,h)計算長方體的體積和表面積，計算結(jié)果使用全局變量帶回主函數(shù)。include “” float l,w,h,v,s。void val(float l,float w,float h)。main(){printf(“Please input lamp。wamp。h:n”)。printf(“l(fā)=”)。scanf(“%f”,amp。l)。printf(“w=”)。scanf(“%f”,amp。w)。printf(“h=”)。scanf(“%f”,amp。h)。val(l,w,h)。}void val(float l,float w,float h){ v=l*w*h。s=2*l*w+2*w*h+2*h*l。printf(“v=%,s=%”,v,s)。}：1/2+1/4+??+1/n，設(shè)n是由鍵盤輸入的正偶數(shù)。include “” main(){ int n,i。float sum=0。printf(“Please input n:n”)。scanf(“%d”,amp。n)。while(n%2!=0){ printf(“Wrong input!Try again:n”)。scanf(“%d”,amp。n)。} for(i=2。i} ：1/1+1/3+??+1/n，設(shè)n是由鍵盤輸入的正奇數(shù)。include “” main(){ int n,i。float sum=0。printf(“Please input n:n”)。scanf(“%d”,amp。n)。while(n%2==0){ printf(“Wrong input!Try again:n”)。scanf(“%d”,amp。n)。} for(i=1。iinclude “” main(){ int i。float sum=0,d=1。for(i=1。id=d。} printf(“sum=%”,sum)。} 、b、c，按從大到小的順序輸出 include “” main(){ int i,j,k,l。/*i,j,k,l分別代表甲乙丙丁。1偷0沒偷*/ for(i=0。ifor(j=0。jfor(k=0。kfor