#incluevoid num(){extern int x,y; int a=15,b=10;x=a-b;y=a+b}int x,y;main(){int a=7,b=5;x=a+b;y=a-b;num();printf("%d,%d\n",x,y);}12,2主要不理解一些外部局部变量的关系,希望能帮我讲讲清楚,
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![#incluevoid num(){extern int x,y; int a=15,b=10;x=a-b;y=a+b}int x,y;main(){int a=7,b=5;x=a+b;y=a-b;num();printf(](/uploads/image/z/13335396-60-6.jpg?t=%23incluevoid+num%28%29%7Bextern+int+x%2Cy%3B+int+a%3D15%2Cb%3D10%3Bx%3Da-b%3By%3Da%2Bb%7Dint+x%2Cy%3Bmain%28%29%7Bint+a%3D7%2Cb%3D5%3Bx%3Da%2Bb%3By%3Da-b%3Bnum%28%29%3Bprintf%28%22%25d%2C%25d%5Cn%22%2Cx%2Cy%29%3B%7D12%2C2%E4%B8%BB%E8%A6%81%E4%B8%8D%E7%90%86%E8%A7%A3%E4%B8%80%E4%BA%9B%E5%A4%96%E9%83%A8%E5%B1%80%E9%83%A8%E5%8F%98%E9%87%8F%E7%9A%84%E5%85%B3%E7%B3%BB%2C%E5%B8%8C%E6%9C%9B%E8%83%BD%E5%B8%AE%E6%88%91%E8%AE%B2%E8%AE%B2%E6%B8%85%E6%A5%9A%2C)
#incluevoid num(){extern int x,y; int a=15,b=10;x=a-b;y=a+b}int x,y;main(){int a=7,b=5;x=a+b;y=a-b;num();printf("%d,%d\n",x,y);}12,2主要不理解一些外部局部变量的关系,希望能帮我讲讲清楚,
#inclue
void num()
{extern int x,y; int a=15,b=10;
x=a-b;y=a+b}
int x,y;
main()
{int a=7,b=5;
x=a+b;
y=a-b;
num();
printf("%d,%d\n",x,y);
}
12,2
主要不理解一些外部局部变量的关系,希望能帮我讲讲清楚,
#incluevoid num(){extern int x,y; int a=15,b=10;x=a-b;y=a+b}int x,y;main(){int a=7,b=5;x=a+b;y=a-b;num();printf("%d,%d\n",x,y);}12,2主要不理解一些外部局部变量的关系,希望能帮我讲讲清楚,
#include
void num()
{extern int x,y;
int a=15,b=10;
x=a-b;y=a+b;
}
int x,y;
main()
{int a=7,b=5;
x=a+b;
y=a-b;
num();
printf("%d,%d\n",x,y);
}
结果5,25
x,y为全局外部变量,在程序任何地方都有效.
x,y的最终值:x=a-b;y=a+b; 决定
结果5,25
#incluevoid num(){extern int x,y; int a=15,b=10;x=a-b;y=a+b}int x,y;main(){int a=7,b=5;x=a+b;y=a-b;num();printf(%d,%d
,x,y);}12,2主要不理解一些外部局部变量的关系,希望能帮我讲讲清楚,
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