maino/编写函数交换两个变量的值* fint a, b void swap(int *p, int*q; printf("in input 2 integers: ) scanf(%od% od", &a, &b); printf(" in before swap: a=%d, b=%d", a, b) swap(, &b)3 printf( in after swap: a=%d, b=d a, b); oid swap(intap,lnt)交换两个变量的值* ;p=05=r3main() /*编写函数交换两个变量的值*/ { int a,b; void swap(int *p,int *q); printf("\n input 2 integers:"); scanf("%d%d",&a,&b); printf("\n before swap:a=%d,b=%d",a,b); swap(&a, &b); printf("\n after swap:a=%d,b=%d",a,b); } void swap(int *p,int *q) /*交换两个变量的值*/ { int t; t=*p; *p=*q;*q=t; }