3. 4.
}
printf(\}
#include void main( ) {
char ch1 = 'E'; if(ch1 >= 'A') ch1++; else
ch1+=32;
printf(\}
#include void main( ) { int x,y,t; x=5;y=3;
if(x>y) { t=x;x=y;y=t;} printf(\ }
5. #include int main() { int a,b,c,m; printf(\ scanf(\ if(a<=b) m=a; else m=b; if(c 输入：21 22 23<回车>
6. #include int main() { char ch1='a',ch2='B',ch3='E'; if(ch1>ch2) if(ch2>ch3) else --ch3; printf(\ return 0; }
ch3++;
7. #include int main() { float x,y; scanf(\ switch((int)x/10) { case 0: y=1.0; printf(\ case 1: y=2*x+1; printf(\ case 2: y=3*x*x+2; printf(\ default: printf(\ } return 0; } 输入：15.3<回车>
8. #include int main() { char ch1='A',ch2='B'; switch(ch1) { case 'A': switch(ch2) { case 'B': printf(\ case 'A': printf(\ } case 'B': printf(\ } return 0; } 9.
#include void main() { float score; score = 100; if (score<60) printf(\ else switch( ( int ) score / 10 ) { case 10: case 9: printf(\ case 8: printf(\ case 7: printf(\ break; case 6: printf(\ break; default: printf(\ } }
10. #include void main() { int i=0，a=2； if(i==0) printf(“**”)； else
