50 lines
693 B
C
50 lines
693 B
C
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#include <stdio.h>
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float pow( float base, int exp )
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{
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/**
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* 该函数为 base != 0, exp >=1 编写
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*/
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if ( exp == 1 ) {
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return base;
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} else {
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return base * pow( base, exp - 1 );
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}
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}
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int main()
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{
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float a;
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int b;
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printf( "input a, b: " );
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scanf( "%f %d", &a, &b );
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/**
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* 默认输入没有错误，且 b >= 0
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*/
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if ( base == 0 ) {
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if ( exp == 0 ) {
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printf( "err to calc 0^0\n" );
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} else {
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printf( "0" );
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}
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} else {
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if ( exp == 0 ) {
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printf( "1" );
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} else if ( exp > 0 ) {
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printf( "%f", exp( a, b ) );
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} else {
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printf( "%f", 1 / exp( a, 0 - b ) );
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}
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}
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printf( "\n" );
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return 0;
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}
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