#include<stdio.h>
float cash;
int main(void)
{
int choice;
float value;
void income(float number),expend(float number);
cash=0;
printf("Enter operate choice(0--end,1--income,2--expend):");
scanf("%d",&choice);
while(choice!=0){
if(choice==1||choice==2){
printf("Enter cash value:");
scanf("%f",&value);
if(choice==1)
income(value);
else
expend(value);
printf("current cash:%.2f\n",cash);
}
printf("Enter operate choice(0--end,1--income,2--expend):");
scanf("%d",&choice);
}
return 0;
}
void income(float number)
{
cash=cash+number;
}
void expend(float number)
{
cash=cash-number;
}
![](//images0.cnblogs.com/blog/570474/201310/06221238-a9433e1ebd704d1a86c616afa4c97cfd.png)