pta基础编程题目集 编程题

#include <stdio.h>

int main(int argc, const char * argv[]) {
int hour,minute;
scanf("%d:%d",&hour,&minute);
if(hour>12 && hour<24)  printf("%d:%d PM\n",hour-12,minute);
else if(hour < 12)          printf("%d:%d AM\n",hour,minute);
else if(hour == 12)         printf("12:%d PM\n",minute);
else if(hour == 24)         printf("0:%d AM\n",minute);
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
int V;
scanf("%d",&V);
if(V > 60)  printf("Speed: %d - Speeding\n",V);
else        printf("Speed: %d - OK\n",V);
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
int a,b,c;
scanf("%d",&a);
scanf("%d",&b);
scanf("%d",&c);

if(a == b)  printf("C\n");
if(a == c)  printf("B\n");
if(b == c)  printf("A\n");
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
int years,hours,base;
float salary;

scanf("%d",&years);
scanf("%d",&hours);

if(years >= 5)  base = 50;
else            base = 30;

if(hours > 40)  salary = base*40 + 1.5*base*(hours-40);
else salary = base*hours;

printf("%.2f\n",salary);
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
double x,y;
scanf("%lf",&x);
if(x <= 15) y = 4*x/3;
else y = 2.5*x - 17.5;
printf("%.2lf\n",y);
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
char c;
int a,b;

scanf("%d %c %d",&a,&c,&b);
if(c == '+')    printf("%d\n",a+b);
else if(c == '-')    printf("%d\n",a-b);
else if(c == '*')    printf("%d\n",a*b);
else if(c == '/')    printf("%d\n",a/b);
else if(c == '%')    printf("%d\n",a%b);
else printf("ERROR\n");
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
double open,high,low,close;
scanf("%lf %lf %lf %lf",&open,&high,&low,&close);
if(close < open)        printf("BW-Solid");
else if(close > open)   printf("R-Hollow");
else if(close == open)  printf("R-Cross");
if(low<open && low<close && high>open && high>close)
printf(" with Lower Shadow and Upper Shadow");
else if(low<open && low<close)
printf(" with Lower Shadow");
else if(high>open && high>close)
printf(" with Upper Shadow");

printf("\n");
return 0;
}

#include <stdio.h>

int main(int argc, const char * argv[]) {
int a,b,length,i,sum = 0;
scanf("%d %d",&a,&b);
length = b-a;
for(i=0; i<=length; i++){
sum += (a+i);
printf("%5d",a+i);
if((i+1)%5 == 0)
printf("\n");
}
if((length+1)%5 != 0)   printf("\n");
printf("Sum = %d\n",sum);

return 0;
}

#include <stdio.h>
int main()
{
double i=1.0,threshold,a=1.0,b=1.0,result,tmp;
scanf("%lf",&threshold);
while (1) {
a *= i;
b *= (2*i+1);
tmp = a/b;
result += tmp;
if(tmp < threshold){
break;
}
i++;
}
printf("%.6lf\n",(result+1)*2);
return 0;
}