C语言实现简单计算器：完整代码示例

#include\x20<stdio.h> #include\x20<stdlib.h>

int\x20main()\x20{ \x20\x20int\x20num1, num2, result; \x20\x20char\x20operator;

\x20\x20printf("Enter\x20the\x20first\x20number:\x20"); \x20\x20scanf("%d",\x20&num1);

\x20\x20printf("Enter\x20the\x20operator\x20(+, -, *, /):\x20"); \x20\x20scanf(" %c",\x20&operator);

\x20\x20printf("Enter\x20the\x20second\x20number:\x20"); \x20\x20scanf("%d",\x20&num2);

\x20\x20switch\x20(operator)\x20{ \x20\x20\x20case\x20'+': \x20\x20\x20\x20\x20result\x20=\x20num1\x20+\x20num2; \x20\x20\x20\x20\x20printf("Result:\x20%d\n",\x20result); \x20\x20\x20\x20\x20break; \x20\x20\x20case\x20'-': \x20\x20\x20\x20\x20result\x20=\x20num1\x20-\x20num2; \x20\x20\x20\x20\x20printf("Result:\x20%d\n",\x20result); \x20\x20\x20\x20\x20break; \x20\x20\x20case\x20'': \x20\x20\x20\x20\x20result\x20=\x20num1\x20\x20num2; \x20\x20\x20\x20\x20printf("Result:\x20%d\n",\x20result); \x20\x20\x20\x20\x20break; \x20\x20\x20case\x20'/': \x20\x20\x20\x20\x20if\x20(num2\x20!=\x200)\x20{ \x20\x20\x20\x20\x20\x20result\x20=\x20num1\x20/\x20num2; \x20\x20\x20\x20\x20\x20printf("Result:\x20%d\n",\x20result); \x20\x20\x20\x20\x20}\x20else\x20{ \x20\x20\x20\x20\x20\x20printf("Error:\x20Division\x20by\x20zero\n"); \x20\x20\x20\x20\x20} \x20\x20\x20\x20\x20break; \x20\x20\x20default: \x20\x20\x20\x20\x20printf("Error:\x20Invalid\x20operator\n"); \x20\x20\x20\x20\x20break; \x20\x20}

\x20\x20return\x200; }