23 lines
386 B
C
23 lines
386 B
C
/*-------------------------------------------------------
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编程计算：s=1-3+5-7+……-99（使用for循环）
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-------------------------------------------------------*/
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#include <stdio.h>
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main()
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{
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int i,f,sum;
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f=1;
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sum=0;
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/**********Program**********/
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for(i=1;i<=99;i++){
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if(i%2==1){
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sum += i*f;
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f*=-1;
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}
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}
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/********** End **********/
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printf("1-3+5-7+...-99 = %d\n",sum);
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}
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