//對(duì)角線元素之和
#include <stdio.h>
int main()
{
int arr[3][3] = {{1,2,3},{4,5,6},{7,8,9}};
int i,j;
int sum=0;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
if(i==j||i%2==j%2)
sum+=arr[i][j];
}
}
printf("對(duì)角線元素之和是:%d\n",sum);
return 0;
}
#include <stdio.h>
int main()
{
int arr[3][3] = {{1,2,3},{4,5,6},{7,8,9}};
int i,j;
int sum=0;
for(i=0;i<3;i++)
{
for(j=0;j<3;j++)
{
if(i==j||i%2==j%2)
sum+=arr[i][j];
}
}
printf("對(duì)角線元素之和是:%d\n",sum);
return 0;
}
2020-02-15
#include<stdio.h>
int main()
{
int arr[] = {0,1,2,3,4,5,6,7,8,9};
int i;
for(i=0;i<10;i++)
{
printf(“%d\n”, arr[i];
}
return 0;
}
int main()
{
int arr[] = {0,1,2,3,4,5,6,7,8,9};
int i;
for(i=0;i<10;i++)
{
printf(“%d\n”, arr[i];
}
return 0;
}
2020-02-15
#include <stdio.h>
int main()
{
int sum = 0;
int i = 1;
while(i<=100)
{
sum = sum + i;
i++;
sum = sum - i;
i++;
}
printf("sum=%d\n",sum);
return 0;
}
int main()
{
int sum = 0;
int i = 1;
while(i<=100)
{
sum = sum + i;
i++;
sum = sum - i;
i++;
}
printf("sum=%d\n",sum);
return 0;
}
2020-02-12
for(i=1; i<5; i++)
{
for(j = i ;j < 5;j++)
{
printf("1"); //把空格換出1 ,好理解多了
}
for(k = 0; k < 2*i-1;k++)
{
printf("*");
}
{
for(j = i ;j < 5;j++)
{
printf("1"); //把空格換出1 ,好理解多了
}
for(k = 0; k < 2*i-1;k++)
{
printf("*");
}
2020-02-12
#include <stdio.h>int main() { if(year%4==0){j=1;}else{j=2;}switch(month){case 1:i=0;break;case 2:i=31;break;case 3:case 4:case 5:case 6:case 7:i=(month-1)*30.5-j;break;case 8:case 9:case 10:case 11:case 12:i=183+(month-7)*30.5;break;}printf("%d年%d月%d日是該年的第%d天",year,month,day,i+day);return 0;}
2020-02-12
#include <stdio.h>
double function( tm,distance)
{double fee;
if(5<=tm<=23)
{if(distance<=3)
{fee=14;}
else
{fee=14+(distance-3)*2.3; }}
else{
if(distance<=3)
{fee=14; }
else{ fee=14+(distance-3)*2.3*1.2;}
return fee;}}
int main()
{double f1=function(9,12);
//f2同理
printf("%f",f1+f2);
return 0;}
double function( tm,distance)
{double fee;
if(5<=tm<=23)
{if(distance<=3)
{fee=14;}
else
{fee=14+(distance-3)*2.3; }}
else{
if(distance<=3)
{fee=14; }
else{ fee=14+(distance-3)*2.3*1.2;}
return fee;}}
int main()
{double f1=function(9,12);
//f2同理
printf("%f",f1+f2);
return 0;}
2020-02-10