C語言。編程實現簡單的四則運算。比如輸入3+5=8，輸入3*5=15。要有算法分析圖和完整的源代碼

#include <stdio.h>

int main()

{int a,b,c;

char op;

scanf("%d%c%d",&a,&op,&b);

while(op!='+'&&op!='-'&&op!='*'&&op!='/')

{printf("只能計算加減乘除，請重新輸入：\n");

scanf("%d%c%d",&a,&op,&b);

}

if(op=='/'&&b==0)

{printf("divided by zero.\n");

return (1);

}

switch(op)

{case '+':c=a+b;break;

case '-':c=a-b;break;

case '*':c=a*b;break;

case '/':c=a/b;break;

}

printf("%d%c%d=%d\n",a,op,b,c);

return 0;

}