3.include<stdio.h> void main(){ char a]="abcdbfkgamd"; inti1=0,i2=0,i=0: while(a[i门){ if(a[i]<e)i1++;else i2++; i++; printf("%d %d\n",il,i2); } 4.include<stdio.h void main(){ inta[8]={4,8,12,16,20,24,28,32}; int p=a; do printf("%d "p); p十=3； while(p<a+8); printf("\n"); 5.include<stdio.h> struct Worker char name[15];int age;double pay;); void main(){ struct Worker a[4]={{"abc",20,2420},{"defa",50,3638}, {"ghin",40,2560},{"jklt",36,2375}}; int i,s=0; for(i=0;i<4;i++)s+=ali].age; printf("s=%5.2LA\n",(double)s/4); 13563. :j:j: include<stdi,). h> void mainO { char a[J = Ii abcdbfkgamd Ii ; int il=O. i2=0 , i=O; while(a[iJ) { if(a [iJ<的il else i2 十 十 print£(" %d %d\n" ,il ,i2) ; 4. :j:j: include<stdio. h> VOId main () { int a[8]={4 ,8,12,16,20,24,28,32}; tnt * p=a; do { printf(" %d "，铃 p+=3; } whi1e(p<a 十8) ; print£( "\nIt) ; 5. :j:j: include<stdio. h> struct Worker { char name[15J; int age; double pay;}; void mainO { struct Worker a[4J = {{" abc" , 20 ,2420} ,{" defa" ,50 ,3638} , {" ghin" , 40 ,2560} , {"jklt" ,36 ,2375}} ; inti , s=O; for(i=O; i<4; 十 + 十=a[i]. age; printf(" s= % 5. 2Lf\n" , ( double)sj 4) ; 1356