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- CSDN专家-link 2021-05-31 20:15关注
#include <stdlib.h> float fMoney = 0; void main() { while(true) { system("cls"); printf("\n\n"); printf("\t\t家庭收支登记程序\n"); printf("\t\t 作者:文立斌\n\n"); printf("\t\t1-收入登记\n"); printf("\t\t2-支出登记\n"); printf("\t\t3-余额查询\n"); printf("\t\t4-结束操作\n\n"); printf("\t\t请输入操作号(0-3):"); int n; float m = 0; scanf_s("%d",&n); system("cls"); printf("\n\n"); switch(n) { case 1: { printf("\t\t-----收入登记-----\n\n"); printf("\t\t期初余额:%.2f\n",fMoney); printf("\t\t本期收入:"); scanf_s("%f",&m); // if(m < 0) { printf("\t\t金额错误,登记失败!\n"); } else { system("cls"); printf("\n\n"); printf("\t\t-----收入登记-----\n\n"); printf("\t\t期初余额:%.2f\n",fMoney); printf("\t\t本期收入:%.2f\n",m); fMoney += m; printf("\t\t期末余额:%.2f\n\n",fMoney); } } break; case 2: { printf("\t\t-----支出登记-----\n\n"); printf("\t\t期初余额:%.2f\n",fMoney); printf("\t\t本期支出:"); scanf_s("%f",&m); // if(m < 0) { printf("\t\t金额错误,登记失败!\n"); } else { system("cls"); printf("\n\n"); printf("\t\t-----支出登记-----\n\n"); printf("\t\t期初余额:%.2f\n",fMoney); printf("\t\t本期支出:%.2f\n",m); fMoney -= m; printf("\t\t期末余额:%.2f\n\n",fMoney); } } break; case 3: { printf("\t\t-----余额查询-----\n\n"); printf("\t\t当前余额:%.2f\n\n",fMoney); } break; case 4: { printf("\t\t谢谢再见\n\n"); } break; default: break; } if(n==4) break; printf("\t\t请按任意键返回..."); getchar(); char ch; scanf("%c",&ch); } }
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