42 lines
697 B
C
42 lines
697 B
C
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#include <stdio.h>
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// 函数的声明，一般当子函数在主函数的下方时，需要在主函数的上方进行声明
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void myfun1();
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void myfun2(int a, int b);
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int myfun3(int a, int b);
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int main(int argc, char *argv[])
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{
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myfun1();
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return 0;
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}
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// 定义一个没有参数也没有返回值的函数
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void myfun1()
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{
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printf("hello world\n");
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printf("nihao beijing\n");
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printf("welcome to 1000phone\n");
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return;
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}
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// 定义一个有参数的函数
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void myfun2(int a, int b)
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{
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int sum;
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sum = a + b;
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printf("%d + %d = %d\n", a, b, sum);
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}
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// 定义一个有返回值的函数
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int myfun3(int a, int b)
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{
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int sum;
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sum = a + b;
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return sum;
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}
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