ARM Vector TableFIQIRQ(Reserved)Data AbortPrefetch AbortSoftware InterruptUndefined InstructionReset132Switch if

(95.1 C

5.2

5.2

5.2

5.2

A,B,A1.An5.2

ififif (expression) statementif (x>y) printf(%d,x);5.3 if

if (x>y) printf(%d,x);if (expression) statement1 else statement2if (x>y) max=x; else max=y;/**/ if (x>y) {max = x; } else {max = y; }5.3 if

if ( expr1 ) statement1else if (expr2 ) statement2else if (expr3 ) statement3...[ else statementn ] 5.3 if

if (salary>1000) {index=0.4;} else if (salary>800) index=0.3; else if (salary>600) index=0.2; else if (salary>400) index=0.1; else index=0; 5.3 if

if(a==b&&x==y) printf(a=b,x=y); if(3) printf(OK); if(a) printf(%d,a);if if(x) if(x!=0) if(!x) if(x==0)

: #include main() { int x,y; scanf(%d,%d,&x,&y); if(x>y) x=y; y=x; else x++; y++; printf(%d,%d\n,x,y); }{},Compile Error!5.3 if

/*ch5_1.c*/#include main(){ int x,y; printf("Enter an integer:"); scanf("%d",&x); y=x; if(yabsolute value :125.3

/*ch5_2.c*/#include main(){ int a,b; printf("Enter integer a:"); scanf("%d",&a); printf("Enter integer b:"); scanf("%d",&b); if(a==b) printf("a==b\n"); else printf("a!=b\n");} Enter integer a:12 Enter integer b:12 a==b Enter integer a:12 Enter integer b:9 a!=b 5.3

/*ch5_3.c*/#include main(){ char c; printf("Enter a character:"); c=getchar(); if(c='0'&&c='A'&&c='a'&&c

/*ch5_3.c*/#include main(){ char c; printf("Enter a character:"); c=getchar(); if(c='0'&&c='A'&&c='a'&&c

if5.3

/*ch5_4.c*/#include main(){ int x,y; printf("Enter integer x,y:"); scanf("%d,%d",&x,&y); if(x!=y) if(x>y) printf("X>Y\n"); else printf("X

if ~ else { }elseif5.3 if

if (a==b) if(b==c) printf(a==b==c); else printf(a!=b); if (a==b) { if(b==c) printf(a==b==c); } else printf(a!=b);if ~ else { }5.3

: main() { int x=100,a=10,b=20; int v1=5,v2=0; if(a

switch( ){ case E1: 1; break; case E2: 2; break; . case En: n; break; [default: ;;]} switch5.3

5.3 switch

E1,E2,En,breakcase{ }switchcase case A: case B: case C: printf(score>60\n); break; ..5.3 switch

switch(score) { case 5: printf(Very good!); case 4: printf(Good!); case 3: printf(Pass!); case 2: printf(Fail!); default : printf(data error!); }score5 Very good! Good! Pass! Fail! data error!

5.3 switch

void main() { int x=1,y=0,a=0,b=0; switch(x) { case 1: switch(y) { case 0: a++; break; case 1: b++; break; } /*break;*/ case 2: a++;b++; break; case 3: a++;b++; } printf(\na=%d,b=%d,a,b); }a=2,b=15.3 switch

/*ch5_5.c*/#include main(){ int c; printf("Enter m or n or h or other:"); c=getchar(); switch(c) { case 'm': printf("\nGood morning!\n");break; case 'n': printf("\nGood night!\n"); break; case 'h': printf("\nHello!\n"); break; default : printf("\n????????\n"); break; }} switch

main( ){int a,b,c; scanf(%d%d%d,&a,&b,&c); if(a>b) if(b>c) printf(%d,%d,%d,a,b,c); else if(a>c) printf(%d,%d,%d,a,c,b); else printf(%d,%d,%d,c,a,b); else if(a>c) printf(%d,%d,%d,b,a,c); else if(b>c) printf(%d,%d,%d,b,c,a); else printf(%d,%d,%d,c,b,a); }3,55

main(){ int y,m,d,date,flag=1; printf(input year,month,day:); scanf(%d,%d,%d,&y,&m,&d); 1.(),55

switch(m) { case 1:date=0;break; case 2:date=31;break; case 3:date=31+28;break; case 4:date=31+28+31;break; case 5:date= 31+28+31+3 0;break; case 6:date= 31+28+31+30+31;break; case 7:date= 31+28+31+30+31 +30;break; case 8:date= 31+28+31+30+31 +30+31;break; case 9:date= 31+28+31+30+31 +30+31 +31;break; case 10:date= 31+28+31+30+31 +30+31 +31 +30;break; case 11:date= 31+28+31+30+31 +30+31 +31 +30 +31;break; case 12:date= 31+28+31+30+31 +30+31 +31 +30 +31 +30;break; default: printf(input error of month!);flag=0; }

if((m>2)&&((y%4==0)&&(y%100!=0)||(y%400==0))) date++; /*2*/date+=d; /**/if(flag==1) printf(year=%d,month=%d,date=%d--no=%d\n, y, m, d, date);}

main(){ int x,x1,m; scanf(%d,&x1); if(x1

#includemain(){ float a,b,c,s,area; scanf(%f%f%f,&a,&b,&c); if(a+b>c&&b+c>a&&c+a>b) //3.,

if(a+b>c&&b+c>a&&c+a>b) { s=0.5*(a+b+c); area=sqrt(s*(s-a)*(s-b)*(s-c)); printf(area=%6.2f,area); if(a==b&&b==c) { printf();} elseif(a==b||b==c||a==c) {printf();} elseif((a*a+b*b==c*c)||(a*a+c*c==b*b) ||(b*b+c*c==a*a)) {printf();} else {printf();} } else {printf() ;}}

main(){ float value1,value2,value3; char op; printf(\nType in your expression:); scanf(%f%c%f,&value1,&op,&value2); // 4.number1 operator number2,operator+,-*,/,numberfloat

switch(op){ case+:value3=value1+value2; break; case-:value3=value1-value2; break; case*:value3=value1+value2; break; case/:if(value2==0) {printf(\nDivision by zero!); exit(1); } value3=value1/value2; break; default:printf(Unknown operator !); exit(0);}printf(Tsis is%6.2f%c%6.2f\n, value1,op,value2,value3 );}

55( P1001045.55.7:5.35.10

,ARM